Two people have been killed in an explosion on Moscow's Ryazansky Prospekt, Russia's TASS state news agency reported, citing emergency services.
Baza, a Telegram channel close to Russia's security services, said two military personnel were killed on Tuesday.
Reuters was not able to independently verify the reports.
A criminal investigation was opened in connection with the death of two men on Ryazansky Prospekt, Russia's RIA state news agency reported, citing Moscow investigators.
Ryazansky Prospekt is a road that starts some 7km southeast of the Kremlin.
Investigators and forensic experts were working at the scene together with employees of other emergency services, TASS agency reported.