There have been protests in a number of cities in Iran amid rising public anger over widespread electricity blackouts.
Videos on social media appeared to show crowds in Shar-e Rey near Tehran, Shiraz, Amol and elsewhere overnight.
Some people can be heard shouting “Death to the dictator” and “Death to Khamenei” – a reference to Supreme Leader Ayatollah Ali Khamenei.
The government has apologised for the blackouts, which it has blamed on a severe drought and high demand.
President Hassan Rouhani explained in televised remarks on Tuesday morning that the drought meant most of the country’s hydroelectric power plants were not operating, and that electricity consumption had surged as people used air conditioning to cope with the intense summer heat.