An American Airlines jet and an Army helicopter collided over Washington, D.C., Wednesday night. The number of casualties is unclear and a search-and-rescue mission is ongoing.

By Trevor Hunnicutt, David Shepardson and Jeff Mason WASHINGTON (Reuters) -Scores of people are feared dead after an American Airlines regional passenger jet and a U.S. Army Black Hawk helicopter collided and crashed into the frigid Potomac River near Reagan Washington National Airport on Wednesday night,

Multiple 911 callers reported the crash near the river just before 8:55 p.m., according to the Metropolitan Police Department and the District of Columbia Fire and EMS.