County Sheriff Ron Bateman told Fox News confirmed the detention of the suspect, while local political leaders said no motive was known for the attack at the Capital Gazette newspaper.
According to Capital Gazette’s own report, “police would not name the suspect or say what type of weapon was used” in the incident to which Anne Arundel County Police initially confirmed at 3:15 PM they were responding.
There were 170 people in the building, the publication wrote.
The Baltimore Sun-owned paper quoted police as saying a “long gun” was used in the incident, an “explosive device” was seized.
Authorities had “tactically secured” the building, it added.
Law enforcement in Baltimore and New York City deployed protective forces to major media outlets, including the New York Times, as a precaution, authorities said.