A videos posted on social media appeared to show two young Iranian men lying motionless on the ground and covered with blood and a voiceover said they had been shot dead by police.

It claimed security forces fired on protesters in the western town of Dorud and killed at least two as other protesters in the same video were chanting, ‘I will kill whoever killed my brother!’.

Other videos showed protesters setting fire to a government office in the city of Khorramabad while in the capital Tehran, demonstrators were filmed tearing down a picture of Supreme Leader Ayatollah Ali Khamenei.