Security services in Russia have arrested eight people including six women in an anti-terrorist operation in the mainly Muslim region of Dagestan.
They were held in a raid on a house in the capital Makhachkala. The women are suspected of planning suicide attacks in Russia. The youngest is said to be fifteen years old.
The authorities say a search of the premises uncovered pistols and two belts it is thought were being prepared for a suicide attack.
They also seized what are thought to have been farewell letters written by the women to their families.
Russia has been struggling to contain an upsurge of attacks by Islamist rebels in the regions to the south.
In March suicide bombings in the Moscow metro killed at least 40 people and injured dozens more. One of the detained men is thought to have been involved, reportedly accompanying the bombers to the two locations.
The authorities say both women who blew themselves up in the attacks came from Dagestan.