International concern is growing over a fresh wave of violence between Israeli forces and Palestinian militants.
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| Air strikes have killed at least 15 and wounded dozens in the Gaza Strip |
Israel has carried out air strikes in the Gaza Strip, while militants have been firing rockets into Israel.
The trigger was a series of attacks in Israel on Thursday when eight civilians died. Five Egyptian policemen were killed as Israel pursued the gunmen.
The Quartet of Middle East peace mediators - the UN, US, EU and Russia - has called for restraint.
Fresh casualties
Since the Thursday attacks, Palestinian militants have fired more than 100 rockets and mortars into Israel, killing one man in Beersheba and injuring dozens of other people. Israeli sources said two children were slightly injured when rockets hit the town of Ofakim.
Egypt also reported rocket fire hitting its territory on Sunday.
Israeli air strikes over the past few days have killed at least 15 people in the Gaza Strip, and injured dozens more.
A strike just north of Gaza City on Sunday reportedly left a 12-year-old boy seriously wounded.
According to the AFP news agency, the Popular Resistance Committees (PRC), a faction in Gaza that is loyal to Hamas but sometimes operates separately, said it had carried out the Beersheba attacks, while the armed wing of Hamas said it had fired four Grad rockets at Ofakim.
Hamas has broken a four-month-old truce by joining other militant groups in Gaza in launching the rocket attacks.
Reports say the Israeli army has arrested dozens of Palestinians with links to Hamas in the West Bank.
Thursday\'s attacks in southern Israel started when gunmen opened fire on a bus near the Red Sea resort town of Eilat. Eight Israelis and seven gunmen were killed.
The incident has also led to a diplomatic dispute between Israel and Egypt. Egypt says it is considering recalling its ambassador.
Israel has expressed "regrets" over the deaths, while thousands of Egyptians have been rallying outside the Israeli embassy in Cairo.
