Israeli Prime Minister Benjamin Netanyahu has said the country's military is prepared to extend its operation against Palestinian Islamist group Hamas in the Gaza Strip.
His comments came after the head of the military wing of Hamas, Ahmed Said Khalil al-Jabari, was killed.
He died when when his car was targeted during Israeli air strikes in the territory.
These followed a wave of rocket attacks against Israel from Gaza.
Arab League foreign ministers will meet in emergency session on Friday to discuss the escalating violence.