US awaiting response from Iran over proposals for ceasefire deal, says Rubio

Diplomatic efforts continuing despite fighting in and around contested strait of Hormuz in recent days

• Middle East crisis – live updates

The US secretary of state, Marco Rubio, has said that Washington is expecting a response from Iran on Friday to its proposals for an interim deal to end the conflict in the Middle East, as Iran accused the US of breaching the increasingly fragile ceasefire announced last month.

In recent days there have been the biggest flare-ups in fighting in and around the contested strait of Hormuz since the informal truce began. The rise in violence followed Donald Trump’s announcement – then rapid pause – of a new naval mission aimed at opening the strategic waterway.