Russian counter-terrorism agents have foiled a terrorist attack on Moscow, killing two of the plotters and arrested another.
The National Anti-Terrorism Committee said the terrorist group was located in a house in the town of Orekhovo-Zuyevo, east of the capital.
According to the BBC, the suspects are said to be Russian citizens who had undergone training in the Afghanistan-Pakistan region.
Unnamed official sources told Russian news agencies the group had planned to target a mass event in central Moscow.
All the three terrorists were Muslims and had been under observation for a month, a source said, adding that they had been trained in North Waziristan, a mountainous region of north-west Pakistan and a stronghold of Taliban and al-Qaeda-linked militants.
The authorities are investigating possible links between the suspects and the militant Islamic Movement of Uzbekistan, the source said.