More than 400 killed in Israeli air strikes in Gaza as ceasefire collapses

More than 400 people have been killed in Israeli airstrikes in Gaza, according to the enclave's health ministry.

Israel says it's carrying out the strikes because Hamas has rejected proposals to extend the Gaza ceasefire agreement.

Hamas has called the attacks a "blatant violation of all international and humanitarian conventions."

Giles Gibson has more from Tel Aviv.

IN: "The Israeli military,..."

OUT: "...Gaza are overwhelmed."
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