Man with gun arrested across from Union Station, Capitol Police say

A man with a gun was arrested Tuesday across from Union Station on Capitol Hill, U.S. Capitol Police say.

Someone spotted the man walking around with a “long gun” in the park alongside Delaware Avenue NE in front of Union Station about 12:30 p.m., police said. Capitol Police said they found the man moments later and commanded him to drop the weapon. Officers then tased him when he didn’t comply, police said.

U.S. Capitol Police Chief Tom Manger said the suspect, 21-year-old Ahmir Lavon Merrell, of Atlanta, is a registered sex offender in Georgia. Medics took Merrell to a hospital in an ambulance and he’s expected to be OK after the tasering, police said.

Manger said police still don’t know why he was there with a gun, which he said resembled an AR-15. Police described the gun as a semi-automatic weapon.

Read more: NBC Washington