Middle East crisis live: Trump rejects Iran response to US peace proposal as Tehran warns of new attacks

US president calls Iranian response ‘totally unacceptable’ while Tehran says it will retaliate against any new US strikes or foreign warships in strait of Hormuz

• Trump calls Iran’s response to peace plan ‘totally unacceptable’ as ceasefire frays

South Korea has condemned an attack against a cargo ship operated by a Korean shipper on 4 May in the strait of Hormuz and said it plans to respond once the source of the attack is identified.

Namu, the vessel operated by the shipper HMM Co., was not in violation of any rules in effect at the time in the waters off the UAE and it was a case of an attack against a commercial vessel that cannot be justified, the official said.