Alexey Navalny has died in correctional colony No. 3 in the Yamalo-Nenets Autonomous District, Russia's regional department of the Federal Penitentiary Service announced on Friday.
"On February 16, in correctional colony No. 3, convict Navalny A.A. felt unwell after a walk and almost immediately lost consciousness. Medical staff of the institution immediately arrived, an ambulance brigade was called," the department said in a statement.
The statement added: "All necessary resuscitation measures were taken, but without positive results. Ambulance doctors pronounced the prisoner dead. The cause of death is under investigation."
Commenting on the reports of Navalny's death, Kremlin spokesman Dmitry Peskov said that the Federal Penitentiary Service is in charge of all inspections, there is no need for special instructions.
According to RT's source, he suffered a blood clot.
Peskov noted that the reasons for Navalny's death should be clarified by doctors.