A security guard at Washington’s Union Station on Friday shot a man who had allegedly stabbed a woman, police said, and both the man and the woman were being treated at area hospitals for injuries that were not life-threatening.

The guard shot a male suspect who had stabbed a woman in an adjacent building, said Metropolitan Police Department’s Jeff Brown, describing it as an “isolated incident.”

The popular tourist destination, the second busiest rail station in the United States, was temporarily evacuated and some people “sheltered in place,” Brown told reporters. The station is half a mile (1 km) from the U.S. Senate.

Amtrak, which serves about 5 million train riders annually at the station, said it had resumed operations “after a brief suspension due to police activity.”