Israeli fire killed at least two people in Rafah and injured three others in Khan Younis in the south of Gaza, raising fear among Palestinians that the ceasefire could collapse altogether after Israel imposed a total blockade on the shattered enclave.

Israel has introduced what it said was a new U.S. ceasefire plan and is trying to force Hamas to accept it by imposing a siege on the Gaza Strip.

Israel will stop the entry of all humanitarian aid into Gaza to pressure Palestinian militant group Hamas into accepting a temporary extension of the ceasefire agreement, officials said on Sunday, a day after the initial phase of the truce expired.