
The death toll of Palestinians killed in the Gaza Strip on Sunday rose to 12, the Hamas-run health ministry said.
The ministry said three people, including a pregnant woman, were killed in northern Gaza and two in southern Gaza, raising an earlier toll of seven.
At least six of those killed were confirmed to be militants affiliated with the Palestinian territory's leaders Hamas or the allied Islamic Jihad group.
Israeli Prime Minister Benjamin Netanyahu said he had ordered the military to launch further strikes on Gaza Strip militants in response to rocket fire from the territory, as an escalation entered its second day.
Gaza militants on Saturday fired some 250 rockets at Israel, which responded with strikes as a fragile ceasefire again faltered in an escalation.
The latest flare-up came with Hamas, the Islamist movement that rules the blockaded Gaza Strip, seeking further concessions from Israel under the ceasefire.
Israel said around 250 rockets were fired from the Palestinian enclave and its air defences intercepted dozens of them.