Denver police have a man in custody after hours of a major manhunt at a downtown building.

Denver police surrounded the building at 110 16th St. this morning to search for a wanted man.

Just after 11 a.m. officers put a man in a car. Denver Police spokesman Sonny Jackson did not release the man's name but said he was the man who prompted the intense police reaction.

Jackson said the man in custody had been hiding in the building and had tried to slip out with workers who were being evacuated.

Police spotted him and detained him. He was not armed when he was taken into custody.

Jackson said businesses and workers in the area will soon be back to normal. Roads were re-opened and the mall shuttle re-started.

A dozen police cars had swarmed the block, and officers with rifles swept the area and the building. A SWAT team in full gear — with helmets and vests — was on the scene.

Cleveland Place was blocked off, and officers asked workers not to enter 110 16th St., a 14-story building commonly known as the Petroleum Building.

The Dazbog's coffee shop on the first floor of the building was locked down, as was Jimmy John's sandwich shop. The shuttle buses on the 16th Street Mall were kept away from the street in front of the building.

Police spokesman Jackson initially said the wanted man was Robert Jackson, 28. There are felony warrants out of Centennial for his arrest on robbery and escape charges, and there is a possible domestic situation.


But after police took a man in custody, Sonny Jackson said that man was not Robert Jackson.

Sonny Jackson said that Aurora police contacted Denver police to say that Robert Jackson would be taking an RTD bus downtown. Aurora warned Denver that their suspect could be armed and dangerous.

Early Monday Denver police officers came into contact with a man they thought to be Jackson downtown, and he ran from them.

The man shed clothing as he ran. Denver officers believed he ran into the Petroleum Building.

"Officers are doing a methodical search," Sonny Jackson said.

It was unclear whether Robert Jackson was ever downtown on Monday. Sonny Jackson would only say that the man in custody was the man who had fled from police. He's being questioned at police headquarters and investigators will try to figure out why he ran in the first place.

Mark Smith, who works for an energy brokerage in the building, said he came down the elevator and was greeted by two police officers with guns drawn in the lobby.

"It scared the s*** out of me," Smith said.

The officers told him to leave through the front lobby doors.

Smith joined the crowd of about 100 people milling about outside.

Jeremy Anderberg works in a sales and marketing office on the 12th floor. He e-mailed about 11 a.m. to say that his office is still conducting business as normal, albeit with the door locked. He said his office has had no communications from law enforcement.

Paige Kanatous works on the fifth floor for an event management company. She said her ceiling began leaking water and she wanted to find someone in building maintenance. She tried to take the elevator but it wasn't working, so she took the stairs.

In the stairwell Kanatous encountered 2 officers, who told her to "Freeze!" She put up her hands and said, "I work here!" The officers relaxed and told her to leave the building "right away."

She did — without her coat — and joined the crowd wondering what was going on.