DENVER (CBS4)- Police in Denver have arrested a suspected gunman near 3rd and Santa Fe where he had barricaded himself inside a building after he allegedly shot at officers early Wednesday morning.

As officers responded to the address at about 6:45 a.m. to investigate a report of domestic violence, a man started shooting at police. No officers were hurt in the shooting.

The barricaded suspect was described as a white man, about 6-foot-1 to 6-foot-2 with a goatee and blondish hair. He was taken into custody at about 2:15 p.m.

Police had blocked off the surrounding streets to traffic during the standoff which added to the already slow morning commute because of the rainy weather.

Mail delivery has been impacted for the 10-block area around the standoff near 800 West 3rd Avenue. Postal carriers have been diverted and will attempt to deliver mail later in the day.

The gunman remained barricaded inside the building until he was arrested. Negotiators worked to get the gunman out of the building.

(credit: CBS)

Witnesses told CBS4′s Jennifer Brice that they believe the domestic incident started inside a nearby 7-Eleven store. They watched the situation escalate and then move to a nearby building.

“You heard shots and then I could see the cops taking cover behind the white truck in the driveway in the house,” witness David Gutierrez said. “Then they started returning fire.”

The police activity forced Denver Public Schools to place the following schools on lockdown: DCIS, 574 W. 6th Avenue, Fairmont Dual Language Immersion Academy, 520 W. 3rd Avenue and Ace Community Challenge School at 948 Santa Fe Drive.

Students who were being bused to Fairmont were re-routed to Fairview Elementary. Those students will remain at Fairview until police deem the area around Fairmont to be safe and the lockdown is lifted.

All students were safe.