An Israeli aircraft has fired rockets at a car carrying Palestinian militants in the northern Gaza Strip, injuring one person.
Israel's army said the strike near Beit Hanoun targeted militants preparing to launch rockets into Israel.
It follows a warning by Israeli PM Ehud Olmert that Israel would take action if Palestinian militants continued firing rockets into Israel from Gaza.
Earlier a rocket landed near a nursery in southern Israel. No-one was hurt.
The Qassam rocket landed in the town of Sderot, a frequent target by militants.
Islamic Jihad said it carried out the attack. Three of the group's members were killed on Friday in a raid by Israeli troops in the West Bank.
On Monday, an Israeli army spokesman confirmed "an air raid in northern Gaza that targeted a vehicle that was carrying arms and was on its way to launch rockets".
The army said one militant was injured.
Islamic Jihad said two of its members were in the car and were going to carry out a "jihadi mission".
But the militant group said it was a bystander who was hurt in the air strike, contradicting the Israeli claim.
Eyewitnesses said two men jumped out of the car before it exploded.
Overnight, the Israeli army said it had detained six suspected Palestinian militants across the West Bank.
The Israeli army says a total of 11 rockets have been fired from Gaza since Friday.