DENVER -- Shocked employees arriving at work Thursday found crooks had burglarized four office buildings overnight, ransacking several workplaces in southeast Denver.

The break-ins occurred at multistory buildings in a three-block stretch of South Oneida Street near East Evans Avenue.

Police said burglars hit a majority of the units in a trio of buildings: Oneida Tower, a six-story building at 2121 S. Oneida St.; 2055 Highline Plaza, a three-story building at 2055 S. Oneida St.; and 2050 S. Oneida St.

Denver police released security camera images of masked men, some with pry tools, prowling the buildings halls.

Police said the intruders entered one building by smashing a window. It's unclear how they accessed the other buildings.

The intruders trashed several offices as they hunted for valuables. Police said they caused thousands of dollars in damage by prying open interior office doors.

The suspects stole computers, cash and other items, according to police and tenants.

One occupant told 7NEWS it was too early to know if something was taken because the crooks made such a mess. The floor was covered with rifled papers and objects.

At a fourth building, 2250 S. Oneida St., only a medical marijuana dispensary was burglarized, police said.

Steve Weiner, a worker at the family-owned Altitude Organics dispensary, thinks a loud alarm scared off burglars about 9:12 p.m. Wednesday.

The dispensary's video security system captured a man with a crowbar, peering around in the dim dispensary, Weiner said. The shop is providing the suspect video and still images to police.

"He did not have a mask on and we have a relatively good picture of his face," Weiner said.

"I don't even think realistically they even knew we were a medical marijuana facility," said Weiner, adding that most of the marijuana was in a safe, but some pot was in display counters.

"If you look at the video, when he comes in the backroom where we have the counters, he immediately turns to where the desk would be and the money would be," Weiner said. "He doesn't see anything, turns around and kind of looks in a bewildered state."

"It's dark and when he looks at the counters, I don't want to say it was a look of surprise on his face, but it looked like he wasn't expecting (marijuana)," Weiner said.

Realizing the blaring alarm would soon summon police, the burglar left empty-handed, he said.

By the time Weiner arrived about 9:25 p.m. to wait for police, he said his building was empty.

But he noticed several suspicious people lurking in the neighbor on foot and two men driving in a car around the block.

After police and Weiner left, two other buildings were hit later in the night, Weiner said.

"I think they may have waited for us to leave," he said.

Doris Crim, who works for a business consulting firm in the Oneida Tower, said when she entered work she spotted a computer cord on the floor and just thought someone had dropped it.

Then she walked farther inside and found someone had shattered the glass case of a candy vending machine.

"They had jimmied the candy machine and taken the money," Crim said.

"Then every office that I passed I could tell was pry barred (open) …. and they had gone in," Crim said,

Crim, whose firm handles government contracts, said the thieves had flipped through a lot of their files and stole a laptop. She didn't know if sensitive information was stolen.

Dozens of tenants in the buildings included dental and pediatric clinics, the Mile High Down Syndrome Association, law offices as well as energy, investment and mortgage companies.

Police crime-scene technicians were scouting the outside of buildings for points of entry and possibly fingerprints and footprints.

The suspects may have been driving a newer model white, four-door Ford pickup with custom wheels, police said.

Anyone with information the burglaries or the suspects is asked to contact the Denver police at 720-913-2000. Those who wish to remain anonymous can call Crime Stoppers at 720-913-7867; or text CRIMES (274637), the subject title DMCS and enter your message; or send an e-mail to metro-denvercrimestoppers.com.

A reward of up to $2,000 is available for information leading to the arrest and charging of a wanted individual.