According to the Israeli army and Palestinian witnesses, several rockets were fired from Gaza into Israel early Thursday morning.
Six rockets were fired, according to an Israeli army statement. Five were intercepted by its air defense system, and one landed in an unpopulated area.
According to witnesses on the Palestinian side, at least eight rockets were fired.
Israel's emergency services reported no casualties immediately following the firing.
The rockets, however, triggered warning sirens in the nearby cities of Sderot and Ashkelon at around 4:00 a.m. local time (0200 GMT), according to the Israeli army.
The attack comes after an Israeli army raid Wednesday in Nablus, in the northern part of the occupied West Bank, during which 11 Palestinians were killed.
More than 80 others were shot and injured, according to the Palestinian health ministry.
The death toll Wednesday surpassed that of an Israeli army raid last month in Jenin, further north, which had been the deadliest West Bank operation since the second intifada, or Palestinian uprising, of 2000 to 2005.
Ziad al-Nakhala, leader of the Gaza-based Islamic Jihad militant group, called the raid a “major crime” that “the resistance must respond to”.