The international Red Cross accused Israel on Thursday of "unacceptable" delays in letting rescue workers reach three Gaza City homes hit by shelling where they eventually found 15 dead and 18 wounded, including young children too weak to stand.

The U.N. and the Red Cross curtailed aid shipments in the Gaza Strip on Thursday after accusing Israeli forces of firing on their drivers, killing one. The threat of a wider conflict arose when militants in Lebanon fired two rockets into northern Israel.