Hamas will not agree to extend the first phase of the Gaza ceasefire deal as requested by Israel, a senior Hamas official said Sunday. Speaking to Al Jazeera, Mahmoud Mardawi said Hamas would only release the remaining Israeli hostages under the terms of the already agreed-upon phased deal.

Israeli Prime Minister Benjamin Netanyahu's office on Sunday said the country had imposed a blockade on all humanitarian aid heading into the Gaza Strip.

The first phase of the ceasefire in Gaza that saw dozens of Israeli hostages and hundreds of Palestinian prisoners freed reached its expiration date on Saturday — with Israel and Hamas split on what comes next.