The US Capitol was put on lockdown Tuesday afternoon, after reports of an active shooter on a nearby street. Washington, DC police arrested two men after a car chase and found a "machine gun" inside the vehicle, local media reported.

Reporters trapped at congressional offices have sent pictures of police activity on 3rd and C Streets NW.

Staff has been told to silence cell phones and move away from the windows, however.

#lockdown on #CapitolHill still enforced. No 1 can come in or out. #police have long guns out at ext of Cannon Bldg pic.twitter.com/5GhY1J4fhy — Manila Chan (@ManilaChan) July 12, 2016

DC police confirmed they have received a call of a "man with a gun" at 1st & C Street NW, according to WJLA.

After reports than someone in a car had a gun, DC police launched a car chase, running down the suspects outside the Capitol. Video from the scene shows an African-American male taken into custody.

An all-clear was given at 4:48 p.m. local time.

#Capitol is on lockdown. Heard a loud bang. Looks like two suspects are in custody right outside Labor Dept tunnel pic.twitter.com/SX3AePwVy7 — Umair Irfan (@umairfan) July 12, 2016

I-395 N/3rd St Tunnel N ramp to C St NW blocked for police activity. #DCTraffic@WTOPtrafficpic.twitter.com/fkdWyuyUd0 — Joe Conway (@JoeConwayWTOP) July 12, 2016

All Miss America contestants were trapped inside the Capitol at one point.

All the Miss America contestants are in the Capitol for the lockdown. I just talked to Miss Utah. pic.twitter.com/gzs987Fpjd — Karoun Demirjian (@karoun) July 12, 2016

Lockdowns are becoming a frequent occurrence at the US Capitol. The most recent incident happened Friday, when a female staffer passed through security with what turned out to be a power drill, prompting reports of a gun.