Israeli missiles struck Gaza City in the early hours of this morning, hitting a building housing the offices of the political branch of Palestinian President Yasser Arafat's Fatah group and another of a pro-Hamas newspaper, witnesses said.
Nobody was inside either office at the time of the airstrikes. The attack on Fatah's office wounded several bystanders, including two children.
The second strike hit the office of al-Resala, a weekly newspaper that supports the Palestinian militant group Hamas, but there were no immediate reports of casualties.
The army had no immediate comment on the airstrikes.
Israeli helicopters hit targets of militant group Islamic Jihad targets in Gaza on Saturday in apparent retaliation for the deaths of 13 soldiers in Gaza last week.
The group, a main faction behind a campaign of suicide bombings against Israelis, said missiles destroyed its leader's office in Gaza but he was safely in hiding. Israel has said it would target all leaders of militant groups.