Israeli missiles hit a car in the Gaza Strip, killing two top militants, drawing threats of reprisals and further compromising Palestinian leader Mahmoud Abbas ’ efforts to restore calm and take control of the volatile seaside territory.

Israeli helicopters attacked a suspected Hamas weapons workshop in Gaza City early today and Prime Minister Ariel Sharon called off a summit with his Palestinian counterpart – a first response to a double suicide bombing that killed 10 Israelis in a heavily guarded Israeli seaport.