Israel says troops fired on masked gunmen in Gaza, but it remains committed to the ceasefire as it continues a new offensive in the West Bank.

Israeli forces pressed on with a big military operation in the city of Jenin in the occupied West Bank on Wednesday, as Israel’s defence minister said the government was changing its “security concept” in the Palestinian territory.

The ceasefire in Gaza between Israel and Hamas stretched into a fifth day on Thursday. Humanitarian aid groups are working to surge food and supplies to the war-ravaged territory as Palestinians scour through mountains of rubble looking for bodies of those killed by Israeli bombardments during the 15-month war.