Dhaka, March 20 -- Residents of Gaza have been plunged into "abject fear" once again, a top UN humanitarian director said on Tuesday, after intense Israeli strikes resumed on the Palestinian territory.

"Overnight our worst fears materialized.

Airstrikes resumed across the entire Gaza Strip," Tom Fletcher, head of the United Nations Office for the Coordination of Humanitarian Affairs, told the UN Security Council in a video meeting.

"Unconfirmed reports of hundreds of people killed. and once again, the people of Gaza living in abject fear."

The council meeting was called - prior to the air strikes - by several member states to discuss the humanitarian situation as Israel has blocked aid into Gaza Strip since March 2.

"This total blockad...