produced Qassam rockets and mortar shells landed in the towns and settlements between Thursday and Friday afternoon, killing a woman in an Israeli community just north of the Gaza Strip Thursday evening, an army spokeswoman said. Already before dawn Friday, Israel retaliated with air strikes on what it said were a Hamas office, a warehouse and two arms workshops in three Gaza locations. No injuries were caused in those strikes. Heavy clashes erupted in Gaza City Friday between Hamas militants and Palestinian security forces searching for the rocket launchers in the southern Zaytoun neighbourhoud. -- SPA 2339 Local Time 2039 GMT