STORY: :: Distressing content warning

An ambulance delivered dead and wounded from an Israeli airstrike in Gaza on Sunday.

Health officials said at least five Palestinians were killed and 16 injured in the attack on a Hamas-led police station.

Medics did not say how many of the casualties were police.

The strike hit a post adjacent to a large tent encampment for displaced families in the southern part of Gaza.

The Israeli military did not immediately comment on the incident.  

Abdul Salam Joudah said he was an uncle to one of those killed.

"We are ordinary citizens," he said. "We are people who believe in a just peace."

Sunday's attack comes as mediators began new efforts to salvage a fragile U.S.-brokered ceasefire deal.

Hamas sources said Egypt is hosting a round of truce talks with leaders from Hamas and other Palestinian factions.

The talks are expected to last for a few days.

A U.S.-brokered truce struck last October ended major military operations. 

It established a Board of Peace led by U.S. President Donald Trump to oversee a phased ceasefire.

But movement on Trump's plan toward a longer term peace and reconstruction of the shattered enclave has faltered.

Israel has not withdrawn its troops from Gaza, where it still controls more than half of the territory.

Hamas has resisted calls for its members to disarm.

It employs nearly 10,000 police officers and Hamas wants them included in a new police force. 

Israel rejects a role for any Hamas-affiliated personnel.

Israel and Hamas have repeatedly accused each other of violating the truce. 

Israeli strikes in Gaza have killed more than 950 Palestinians since the start of the truce, while Palestinian militant attacks have killed four Israeli soldiers.

And the desperation is only growing:  Nearly the entire population of 2 million now lives in a tiny strip of land along the coast, mainly in makeshift tents or damaged buildings, under Hamas control.