At least 12 people have been killed in Iran since protests against fuel price rises erupted three days ago, officials have said, although reports suggest the number of dead is far higher.

The situation on the streets is unclear on account of a nationwide internet shutdown. But demonstrations are reportedly continuing in some cities.

The government said Monday had been “calmer”, despite “some minor issues”.

Meanwhile, the powerful Revolutionary Guards demanded an end to the unrest.

A statement said Iran’s “sworn and evil enemies” had once again attempted to “sow discord”, and that the force would “firmly deal with the continuation of any kind of insecurity or actions to disrupt the people’s calm and comfort”.