Three days after the terrorist attack on a Moscow concert hall, 97 people are still being treated in hospitals, the head of the Moscow region’s health administration said on Monday. The patients are spread across hospitals in the capital and the Moscow region, Lyudmila Bolatayeva said. According to Russian news agencies, the injuries suffered varied in severity. By the Russian authorities’ most recent count, 137 people were killed and more than 180 injured in the attack on Friday evening. It cannot be ruled out that more bodies will be found in the rubble of the burnt-out hall. Four armed men …