GAZA, July 29 (Xinhua) -- New Israeli strikes carried out overnight on Tuesday have so far killed 13 more Palestinians after the artillery shelling on Jabalia town in northern Gaza Strip, medics said.

Gaza Health Ministry spokesman Ashraf al-Qedra said that the 13 Palestinians, including a paramedic, were killed in intensive Israeli artillery shelling on residents' houses in Jabalia town in northern Gaza Strip. He added that 40 people were also injured.

Witnesses said that the eastern area of Jabalia was intensively struck by dozens of tanks shells fired by Israeli ground forces stationed east of the town, causing many casualties.

Earlier on Tuesday evening, another 12 Palestinians were killed in Israel's artillery shelling on various areas in northern, eastern and southern Gaza Strip, al-Qedra said, adding that dozens were injured.

According to the Gaza-based Health Ministry, the total death toll in the enclave since Israel started the offensive there has risen to 1,231, with some 7,000 wounded.