An undated aerial handout photo shows the National Security Agency (NSA) headquarters building in Fort Meade, Maryland. Authorities say they've arrested a man suspected of firing on an NSA building. Reuters

A man suspected of firing a weapon at a National Security Agency (NSA) building and other locations in the state of Maryland was held by authorities on Wednesday, media reports said, citing the FBI.

Amy Thoreson, a spokeswoman for the FBI’s Baltimore office, told reporters that authorities believe the man may also have been involved in other shooting incidents in the Baltimore and Washington areas in recent days, The Washington Post reported. The man was not named and no motive was given.

“We believe the subject responsible for shooting incidents on the ICC, near Fort Meade Army installation and other locations around the Baltimore-Washington metro area in the last two weeks is in custody,” Thoreson said.

On Tuesday, a truck driving on the Intercounty Connector road in Maryland was shot at. One man in the truck was bruised by a bullet fragment, and another had his face cut by glass, Lt. Kevin Ayd of the Maryland Transportation Authority Police said. Both were sent to the hospital with injuries that reportedly were not serious.

Also on Tuesday, about 12 miles from the truck shooting, a building at the NSA campus in Anne Arundel County was fired upon, according to U.S. Park Police. There were reportedly no injuries, and police initially had no information about who might have fired upon the building. Authorities initially saw no reason to connect the two incidents, and the Baltimore FBI office announced Tuesday that it would take over the investigation of the NSA incident as it was a federal installation.

There have been a string of other incidents in Anne Arundel, Prince George's and Howard counties that the suspect may be implicated in, The Baltimore Sun reported.

“We’re going to do our best to find out what happened,” Ayd told the Post.