CNN
Now playing
01:04
US women's soccer members sue for gender discrimination
Mandatory Credit: Photo by JIM LO SCALZO/EPA-EFE/Shutterstock (11895253o)
An image made with a drone shows fuel tanks at a Colonial Pipeline breakout station in Woodbine, Maryland, USA, 08 May 2021. A cyberattack forced the shutdown of 5,500 miles of Colonial Pipeline's sprawling interstate system, which carries gasoline and jet fuel from Texas to New York.
Cyberattack forces shutdown of Colonial Pipeline in US, Woodbine, USA - 08 May 2021
Jim Lo Scalzo/EPA-EFE/Shutterstock
Mandatory Credit: Photo by JIM LO SCALZO/EPA-EFE/Shutterstock (11895253o) An image made with a drone shows fuel tanks at a Colonial Pipeline breakout station in Woodbine, Maryland, USA, 08 May 2021. A cyberattack forced the shutdown of 5,500 miles of Colonial Pipeline's sprawling interstate system, which carries gasoline and jet fuel from Texas to New York. Cyberattack forces shutdown of Colonial Pipeline in US, Woodbine, USA - 08 May 2021
Now playing
02:12
Pipeline shutdown could push fuel prices higher
ATLANTA - APRIL 30:  A Boeing 757 with a new Delta Airlines logo sits on the tarmac following the company's emergence from bankruptcy at Hartsfield Jackson International Airport April 30,2007 in Atlanta, Georgia. The 757 sports new branding that will appear on more than 900 planes, at airports and on advertising.  (Photo by Barry Williams/Getty Images) 757
Barry Williams/Getty Images North America/Getty Images
ATLANTA - APRIL 30: A Boeing 757 with a new Delta Airlines logo sits on the tarmac following the company's emergence from bankruptcy at Hartsfield Jackson International Airport April 30,2007 in Atlanta, Georgia. The 757 sports new branding that will appear on more than 900 planes, at airports and on advertising. (Photo by Barry Williams/Getty Images) 757
Now playing
01:45
Hear cockpit audio of Delta pilots reporting bird strike
screengrab palestinian
CNN
screengrab palestinian
Now playing
05:21
Palestinians fight eviction from homes in East Jerusalem
CNN
Now playing
01:38
Lawmakers push airlines to drop flight credit restrictions
ORLANDO, FLORIDA - FEBRUARY 28:  Former President Donald Trump addresses the Conservative Political Action Conference held in the Hyatt Regency on February 28, 2021 in Orlando, Florida. Begun in 1974, CPAC brings together conservative organizations, activists, and world leaders to discuss issues important to them. (Photo by Joe Raedle/Getty Images)
Joe Raedle/Getty Images
ORLANDO, FLORIDA - FEBRUARY 28: Former President Donald Trump addresses the Conservative Political Action Conference held in the Hyatt Regency on February 28, 2021 in Orlando, Florida. Begun in 1974, CPAC brings together conservative organizations, activists, and world leaders to discuss issues important to them. (Photo by Joe Raedle/Getty Images)
Now playing
02:15
Trump issues bizarre statement about Kentucky Derby winner
KRDO
Now playing
01:26
Six killed in shooting at Colorado birthday party
Justin Bamberg nr intv 05092021
CNN
Justin Bamberg nr intv 05092021
Now playing
04:05
Hear why this lawmaker is comparing his state to North Korea
Now playing
03:29
Renowned chef offers $50 gift card to those who get vaccinated
Kevin McCarthy 05092021
Fox News
Kevin McCarthy 05092021
Now playing
03:30
Watch McCarthy confirm support for Stefanik for GOP leadership post
LOUISVILLE, KENTUCKY - MAY 01: Medina Spirit #8, ridden by jockey John Velazquez, (R) crosses the finish line to win the 147th running of the Kentucky Derby ahead of Mandaloun #7, ridden by Florent Geroux, and Hot Rod Charlie #9 ridden by Flavien Prat , and Essential Quality #14, ridden by Luis Saez, at Churchill Downs on May 01, 2021 in Louisville, Kentucky. (Photo by Tim Nwachukwu/Getty Images)
Tim Nwachukwu/Getty Images
LOUISVILLE, KENTUCKY - MAY 01: Medina Spirit #8, ridden by jockey John Velazquez, (R) crosses the finish line to win the 147th running of the Kentucky Derby ahead of Mandaloun #7, ridden by Florent Geroux, and Hot Rod Charlie #9 ridden by Flavien Prat , and Essential Quality #14, ridden by Luis Saez, at Churchill Downs on May 01, 2021 in Louisville, Kentucky. (Photo by Tim Nwachukwu/Getty Images)
Now playing
02:50
Kentucky Derby winner's trainer speaks out after doping allegations
CNN
Now playing
02:02
WH Covid-19 response coordinator: We're turning the corner on pandemic
caitlyn jenner immigration path to citizenship bash intv sot vpx_00000000.png
caitlyn jenner immigration path to citizenship bash intv sot vpx_00000000.png
Now playing
01:20
Caitlyn Jenner: Immigrants should have a legal path to citizenship
CNN/@walidbarahmeh
Now playing
03:04
China's out-of-control rocket lands on Earth
CNN Weather
Now playing
01:53
Severe storms threaten millions this Mother's Day
CNN
Now playing
03:05
3 injured in Times Square shooting
Getty Images
Now playing
00:46
Actress Tawny Kitaen dies at 59
(CNN) —  

Members of the top-ranked US women’s national soccer team on Friday – about three months before the upcoming World Cup – filed a federal class-action lawsuit against the US Soccer Federation citing gender discrimination, according to court documents.

Twenty-eight members of the team are listed as plaintiffs in the suit, which was filed in US District Court in California where the women are employed when they gather for national team camp.

The suit states that the women filed on behalf of themselves and all other similarly situated current and former women’s national team players “who the USSF has subjected to its continuing policies and practices of gender discrimination.”

The suit alleges that the federation discriminates by paying the women less than members of the men’s national team “for substantially equal work and by denying them at least equal playing, training, and travel conditions; equal promotion of their games; equal support and development for their games; and other terms and conditions of employment equal to the MNT.”

US Soccer did not immediately respond to a CNN request for comment.

The US Women’s National Team Players Association said it is not a party to the lawsuit, but supports the goal of eliminating gender-based discrimination at Chicago-based US Soccer, which governs the senior and youth national teams and recreational teams and leagues.

It said progress has been made in the past few years to draw female players closer to their male counterparts.

“However, gaps remain,” the union said adding it will fight for change through collective bargaining agreements.

02:12 - Source: CNN
One-on-One with World Cup winner Hope Solo

The American women have had much more success on the pitch than their male counterparts, winning three World Cups and four Olympic gold medals.

The July 5, 2015, Women’s World Cup title game between the US and Japan was the most watched soccer game in American TV history. The 2019 FIFA Women’s World Cup, which will be held in France, starts in June, and the US is one of the favorites to hoist the trophy. It is ranked No. 1 in the most recent FIFA rankings.

“Despite the fact that these female and male players are called upon to perform the same job responsibilities on their teams and participate in international competitions for their single common employer, the USSF, the female players have been consistently paid less money than their male counterparts,” the lawsuit states. “This is true even though their performance has been superior to that of the male players – with the female players, in contrast to male players, becoming world champions.”

This is not the first legal battle between the federation and members of the women’s team. In March 2016, five players filed a complaint with the Equal Employment Opportunity Commission, the federal agency that enforces equal pay law. Four of those players are plaintiffs in the new suit: Alex Morgan, Megan Rapinoe, Carli Lloyd and Becky Sauerbrunn.

Hope Solo, the former player who also was also party to the complaint, filed a lawsuit against US Soccer in August.

According to the latest suit, Morgan, Lloyd, Rapinoe and Sauerbrunn seek to represent all current or former players who were members of the women’s national team at any time since February 4, 2015.

The complaint from 2016 was not resolved. However, in April 2017, it was announced that the US Women’s National Team Players Association had struck a new labor deal with US Soccer, ratifying a new collective bargaining agreement through 2021.

The agreement covered the 2019 FIFA Women’s World Cup and the 2020 Olympics. When the deal was announced, CNN reported that in addition to better pay and bigger bonuses, the women received better hotel and travel accommodations and would be reimbursed for the years when their per diems were less than those of the men.

Friday’s filing was first reported by The New York Times.

CNN’s Steve Almasy contributed to this report.