Iran says it will use all available tools to respond to Israel's attack

British FM says he has spoken to his Israeli and Iranian counterparts in separate calls seeking to avoid escalation into a "catastrophic" regional war after Israel struck Iranian military sites.

DUBAI - Tehran will use all available tools to respond to Israel's attack, Iranian Foreign Ministry Spokesperson Esmaeil Baghaei said on Monday, after Israel's Saturday strikes on Iran.

Britain's foreign minister David Lammy said he had spoken to his Israeli and Iranian counterparts in separate calls on Sunday seeking to avoid escalation into a "catastrophic" regional war after Israel struck Iranian military sites.

"Today I held important calls with Israeli FM (Israel Katz) and Iranian FM (Abbas Araghchi). The UK continues to press for de-escalation and an end to the conflicts in Lebanon and Gaza," Lammy said in a statement after an Israeli air attack early on Saturday against Iranian targets.

"A regional war would be catastrophic and is in no one's interests," he said.