Murtazin, a vocal critic of the Kazan mayor and other city officials, says he was attacked by two men near his Kazan apartment last night.
Murtazin's family members told RFE/RL that they suspect the attackers are connected to the Kazan city administration.
Murtazin is working on a book, "Mayoral Team," which details corruption in the city government. He has accused current city officials of involvement in major corruption schemes linked to the city's public transportation system.
Murtazin also wrote "Last President of Tatarstan," which describes the authoritarian methods of Tatarstan's current president, Mintimer Shaimiyev.
Murtazin worked as a presidential spokesman from 1999 to 2002 before becoming an author and journalist.