Palestinian health officials said at least 17 people were killed by Israeli fire near Al-Falouja in Jabalia, the largest of Gaza's eight historic refugee camps, while 10 others were killed in Bani Suhaila in eastern Khan Younis in the south when an Israeli missile struck a house.

Standing in the ruins of his home, Nidal al-Arabeed took stock after more than 10 of his family members were killed by Israeli air strikes on the city of Jabalia, as the army tightened its seige on northern Gaza.

Thousands of people are trapped in Gaza's Jabalia camp as Israeli forces attack the area, Médecins Sans Frontières (Doctors Without Borders) said on Friday, a week after Israel launched an offensive there which it says is aimed at stopping Hamas regrouping.