Gaza City, Gaza (CNN) -- An Israeli airstrike on Gaza killed three Palestinian militants Monday night, Palestinian medical officials said.
Those killed were members of the Salafist jihadist movement, the officials said. They were at an observation post in the Bureij refugee camp, south of Gaza City, when they were hit about 11:45 p.m. (5:45 p.m. ET), they said.
The Israeli miltary said its aircraft struck at a group of "terrorist operatives" who were planning to launch rockets over the border into Israeli territory.
Palestinian officials said a second airstrike on the territory struck the home of a leader of the Islamic militant group Hamas, which has ruled Gaza since 2007, but no injuries were reported. An Israeli military spokesman said only one airstrike had been carried out, however.
Israel pounded Gaza for nearly a month in late 2008 and early 2009 in an effort to stop Palestinian rocket attacks aimed at Israeli towns. Periodic rocket attacks have continued since then, as have Israeli airstrikes on the territory.
The Israel Defense Forces said 150 rockets and mortar shells have been launched from Gaza into Israel since the beginning of 2010.
CNN's Kareem Khadder contributed to this report