The Smithsonian’s National Air and Space Museum on the Mall has reopened after authorities cleared a suspicious package found near an unconscious man, D.C. police said.

The package — a briefcase — contained no harmful materials, police spokesman Araz Alali said.

The museum was evacuated Wednesday afternoon as police examined the briefcase, which was found on the second floor near an unconscious man, authorities said. The package was located in the Time and Navigation section of the museum, said Lelani Woods, a spokeswoman for the Park Police. It was reported at 12:47 p.m. on Wednesday.

The unconscious man, who was taken to the hospital, may have been diabetic, Woods said. She said authorities are still investigating whether the briefcase belonged to him.

Melissa Roseboro, a McDonald’s employee at the Air and Space museum, said she was working when security guards rushed in to open the doors for tourists and workers.

“We had to tell people to leave their food and leave the building,” said Roseboro, 53 of the District.

Roseboro said the evacuation was conducted in an orderly fashion. Afterward, Roseboro said she was glad police did not discover “something serious”