Palestinian officials say an Israeli air strike has killed at least one person in Gaza City.
They say the strike hit two vehicles carrying members of the militant group Islamic Jihad.
The Israeli army has not commented on the incident, which came hours after three men were killed in another Israeli strike in the city. That attack hit a vehicle and buildings linked to the Palestinian militant group, the al-Aqsa Martyrs Brigades.
Israel launched the strikes on Sunday after Palestinians fired rockets from Gaza into southern Israel on Friday.
Elsewhere, Israeli police say a knife-wielding Palestinian man killed a woman and wounded five other passengers on a bus near Tel Aviv. Authorities say the man entered Israel from the West Bank.