Reports by late afternoon Toronto time on Monday say that the terrible explosion on the St. Petersburg subway system has killed eleven and injured at least 45. Also late-breaking (4 p.m. EDT) is a police analysis that throws cold water on the idea that two bombs exploded, as reported earlier. Instead, Russia’s National Anti-Terrorism Committee says it has found and deactivated a bomb at another St. Petersburg subway station. Russia has a long history of Chechen terrorist activity, although the last incident is said to have been in 2011. Russia’s Interfax news agency has cited a law enforcement source as saying the perpetrator is an Islamist terrorist.