Two elderly nuns, who were also siblings, died in a monastery in Geraka, northeastern Athens, early yesterday, after a fire broke out in their bedroom for reasons that remained unclear late last night. Firemen said they found the bodies of the two women, whose names and ages were not made public, in their bedroom at the Aghios Timotheos Monastery in Geraka, which is part of the Mount Pendeli Monastery. One of the nuns, believed to have had mobility problems, was found in her bed. She had died of third-degree burns. Her sister, whose body was found in a chair next to the bed, is believed to have died after inhaling toxic fumes. The firemen managed to bring the blaze under control before it could spread to other parts of the monastery and were seeking to determine the cause of the fire.