Subway derailment sends 20 to hospitals

? A subway train derailed Sunday near downtown Washington, sending 20 people to the hospital and prompting the rescue of 60 people from a tunnel, officials said.

The accident happened at about 3:45 p.m. near the underground Mount Vernon Square station, which serves two lines beneath the Washington Convention Center, Metro spokeswoman Cathy Asato said. There were about 150 people on the train.

At least one person had a serious but not life-threatening injury, Asato said. The other injuries were mostly “bumps and bruises,” and one of those with minor injuries was pregnant.

Part of the six-car train had pulled into the station when the fifth car left the track and hit the tunnel wall, Asato said. All the cars remained upright.

About 60 people in the last two cars had to wait about 45 minutes for firefighters to reach them and escort them through the tunnel on a catwalk.