The Washington DC fire department is extinguishing a fire in the basement of St. John's Church, it said on Twitter.
The iconic church is just blocks from the White House, and is known as the “Church of the Presidents” because many presidents have attended services there, including President Donald Trump.
There have been protests in the area all day, and protesters set several fires there Sunday evening.
The city is now under curfew, which went into effect at 11 p.m. local time and will be active until 6 a.m. Monday morning.