Israel has deployed tanks and troops to its border with Gaza, as it mulls whether to launch a ground operation in the territory after days of violence.
Conflict raged throughout Thursday as Palestinian militants fired rockets into Israel and the Israeli army maintained a barrage of air strikes.
More than 100 people have been killed in Gaza and seven have died in Israel.
Jewish and Israeli Arab mobs have also been fighting within Israel, prompting the president to warn of civil war.
