On Sunday, protests grew considerably in scope and violence, leading Al Jazeera English to describe the situation as the "biggest unrest since the 1979 revolution". It also reported that protests seemed spontaneous without any formal organization. Buses and trash cans were burned, and parked cars blocked streets and highways in Tehran and routes leading into the city. Protesters attacked shops, government offices, police stations, police vehicles, gas stations and banks. Barricades were installed around all government ministries, embassies (there were reports of shootings outside the Russian Embassy, which supported the election results), Mehrabad and Imam Khomeini International Airport, where there were scenes of large clashes with riot police. Large protests, which escalated into riots, broke out at Tehran University, Amirkabir University, and Shahid Beheshti University. Other protests occurred in Ahwaz, Shiraz, Gorgan, Tabriz, Rasht, Babol, Mashhad, Isfahan, Zahedan, Qazvin, Sari, Karaj, Tabriz, Shahsavar, Orumieh, Bandar Abbas, Arak, and Birjend. In Gorgan, protestors broke into a Basij base and killed several IRGC officials, causing mass purges and attacks in the city. Since riot police are largely limited to Tehran, the IRGC and the Basij were dispatched to quell protests in other cities.