At least one person has died in central Moscow after an attacker opened fire outside the headquarters of Russia's intelligence agency.
Early reports suggested a higher number of fatalities as well as uncertainty over whether the shooting happened in or near the building.
The agency, called the Federal Security Service (FSB) and formerly known as the KGB, has reportedly said the gunman has been "neutralised" and five people were wounded, one critically. This includes two security officers.
It confirmed that one of its officers had died in the attack and that the lone attacker did not manage to enter the FSB's building.
Russian television channel, RT TV, reported the intelligence services have said the incident is "an act of terrorism", although the authorities have not confirmed they are treating the incident as a terror attack.
"The shooting began around 17:40," one witness told Reuters. "I saw a member of the traffic police running down the road, hiding behind vehicles."
Armed special forces have been deployed to the scene, according to Reuters.
Police have also extended the cordon surrounding the building.
The shooting came shortly after President Vladimir Putin's annual news conference.
Mr Putin's spokesman, Dmitry Peskov, said he had been told of the attack.
Reporting by IRN
