WASHINGTON, March 3 -- Gunshots hit a building of U.S. National Security Agency (NSA) headquarters on Tuesday, police said.

U.S. National Parks Police spokeswoman Alicia Woods told reporters that police found evidence of multiple shots hitting a wall of one of the NSA buildings on the Baltimore-Washington Parkway at Route 32.

No injuries were reported, and police and the NSA had no information about the cause of the shooting, she added.

The northbound Baltimore-Washington Parkway was temporarily shut down as police were investigating the incident.