Iran has warned Israel of regional escalation if the Israeli military enters Gaza for a ground invasion as the war with Hamas enters its second week.

“If the measures aimed at immediately stopping the Israeli attacks that are killing children in the Gaza Strip end in a deadlock, it is highly probable that many other fronts will be opened. This option is not ruled out and this is becoming increasingly more probable,” Iranian Foreign Minister Hossein Amir-Abdollahian told Al Jazeera on Sunday.

“If the Zionist entity [Israel] decides to enter Gaza, the resistance leaders will turn it into a graveyard of the occupation soldiers,” he added.

Since the Palestinian armed group Hamas launched an unprecedented attack inside the Israeli territory on October 7, Israeli air strikes have killed more than 2,670 people – a quarter of them children – and wounded nearly 10,000 others in Gaza, where a catastrophic humanitarian crisis is unfolding.

The United Nations estimates one million people – nearly half of Gaza’s population – have been forced from their homes, as the Israeli military prepares for an expected ground invasion.

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At least 1,400 people, including 289 soldiers and some foreign nationals, have been killed on the Israeli side, officials said on Sunday.

Tehran has rejected claims it was directly involved in the Hamas assault on Israel last weekend.

Amir-Abdollahian on Saturday met with Hamas leader Ismail Haniyeh in Qatar, where they discussed the Gaza crisis “and agreed to continue cooperation”, Hamas said in a statement.

Also on Saturday, Iran’s Supreme Leader Ayatollah Ali Khamenei said all Islamic nations have a duty to come to the aid of the Palestinians.