The Israeli military said about 2,200 rockets have been launched from Gaza into Israel on Saturday since fighting began.
Those numbers contradict figures from Hamas military commander Muhammad Al-Deif, who previously said that 5,000 rockets had been launched.
To put that in context, some 4,000 rockets were fired from Gaza into Israel during the 50-day war between the two sides in 2014.
Reinforcements: Israel Defense Forces spokesman Rear. Admiral Daniel Hagari said in a statement that the military would reinforce southern Israel and the communities surrounding Gaza
"Numerous IDF soldiers, including special forces, have been dispatched to the area surrounding the Gaza Strip and are operating in a number of different locations in the division in order to protect the residents of southern Israel," the IDF said in a statement.