Russian officials say they have detained a suspected accomplice of the suicide bombers that attacked Moscow's subway system in April, killing 40 people.
The National Counterterrorism Committee said the man, who was not identified, was suspected of providing transport and lodging for the two suicide bombers.
Officials said the arrest was made in the southern republic of Daghestan.
The committee also announced that six women in have been arrested in Makhachkala, Daghestan's capital, on charges of training for suicide attacks.
Human rights groups say Russian officers often accuse innocent civilians of siding with Islamic militants.
compiled from agency reports