Another Palestinian died on Sunday hours after being wounded in an Israeli airstrike in northern Gaza Strip, which had killed one of his colleagues and injured two others, witnesses and medical sources said.

The 26-year-old Palestinian had spent half an hour at the hospital's morgue before people found he was still breathing and took him back to the operation room. He died shortly afterwards.

Israeli pilotless drones had fired a missile at a car carrying activists, killing one on the spot, wounding one seriously and two others moderately.

The Islamic Jihad movement, in a brief statement, said the four were members of its armed wing, while Israel said the militants were on their way to fire rockets on its southern territories.

The strike came hours after Gaza-based factions announced that they decided to commit to an unofficial ceasefire with Israel following a week of violence.

The Hamas, which controls Gaza since 2007, invited the factions for a meeting to restore calm after the violence killed 10 Palestinians.

Early last week, the Hamas fired a barrage of mortars and missiles towards Israel, ending the shaky lull since the end of Israel's three-week offensive against Gaza from December 2008 to January 2009.