Officials have lowered the number of fatalities in Monday's Washington subway system accident to seven, instead of the nine reported earlier. Mayor Adrian Fenty said officials are 'going to let the investigation run its course' and said that hopefully the number will not exceed seven by the end of the day. Fenty also said that two in the accident remain in critical condition in area hospitals. He said he has been told that their conditions are stable. The accident in Monday's rush hour on the Red Line of the Metro system was the worst in the 33-year history of the subway system in the U.S. capital city. 