Iran accused the US on Thursday of striking railway bridges en route to the holy city where the slain supreme leader was buried as a fragile truce between the two countries unravelled.
Huge crowds gathered as the former supreme leader Ayatollah Ali Khamenei was buried at a shrine in Mashhad, northeast Iran, the culmination of a week of mass funeral processions and rallies. Khamenei was killed in a US/Israeli airstrike on the first day of the war on 28 February.