By Anna Chernova and Radina Gigova, CNN
At least seven children were killed when a gunman wearing Nazi symbols opened fire at a school in the western Russian city of Izhevsk, Russian state media reported Monday.
Thirteen fatalities have been recorded so far, according to state news agency TASS. Among those killed was the school’s security guard, head of the regional government Alexander Brechalovn said in a video…