US Navy medic killed by police after critically wounding two people in Maryland

A crime scene technician stands near the scene of a shooting at a business park in Frederick, Maryland (Julio Cortez/AP)

A US Navy medic shot and critically wounded two people at a Maryland business park, then fled to a nearby military base where he was shot and killed, police and navy officials said.

The gunman entered a business at the Riverside Tech Park, causing people inside to flee, but it was unclear if the shooting took place inside or outside, Frederick Police Chief Jason Lando said.