Israel says 15 trucks carrying aid have been allowed into northern Gaza, where aid groups have warned that a monthlong Israeli offensive could cause a famine.

Human Rights Watch said in a report released Thursday that Israel has committed war crimes and crimes against humanity in the Gaza Strip, including massive forced displacements that amount to ethnic cleansing.

An Israeli government agency tasked with co-ordinating aid deliveries to Gaza is rejecting figures reported by international organizations on the number of supply trucks entering the war-torn enclave,