The social media videos show dozens of people cheering as a flash of fire is sparked in a building.Separate videos posted by 1500Tasvir purported to show marchers in several cities in Sistan-Baluchistan province, including the capital Zahedan, where protesters chanted "Death to Khamenei", and Chabahar, where demonstrators removed and trampled the sign of an avenue named after Ayatollah Khomeini.On Friday, Tasnim reported pro-government demonstrators in the northeastern city of Mashhad, where two members of the Basij militia were killed on Thursday.Videos on social media showed riot police confronting a crowd attending the funeral of Aylar Haghi, a medical student allegedly killed by security forces during protests in the northwestern city of Tabriz.It also said that three other Revolutionary Guards and a Basij member were killed in Tehran, and one Basiji and one member of the police were killed in Kurdistan on Thursday."