Maryland officer shot outside police station

A police officer was shot and critically wounded on Sunday as an active-shooter situation unfolded outside a Prince George's County police station in the Maryland suburbs of Washington, authorities said on Twitter.
There were no immediate details on the circumstances of the shooting as police urged residents in a tweet to stay inside and away from the police station in the vicinity of Landover, Maryland, about 8 miles east of the nation's capital.
Police also said a shooter or shooters remained at large.
A dispatch clerk answering the phone at the station declined to provide any information.