One police officer killed and two wounded by gunman in Colorado Springs

A police officer was shot and killed on Monday, the third officer to be gunned down in the line of duty in Colorado in the past five weeks.

Micah Flick, 34, was killed while investigating a stolen vehicle in Colorado Springs, about 70 miles (110 km) south of Denver, authorities said.

Two other deputies, a Colorado Springs police officer and a bystander were injured, authorities said. All were hospitalised, but the extent of their injuries wasn't immediately released.

The lone suspect was also killed, authorities said.

The names of the injured officers, the bystander and the suspect were not immediately released.

Sheriff Bill Elder said Flick, who was killed on his 11th anniversary with the department, is survived by his wife and 7-year-old twins.

"Deputy Flick was an outstanding member of my agency and he will be missed," Elder said.

Colorado Springs Police Chief Pete Carey said it was a tough day for all law-enforcement agencies.

"Tonight there is no distinction between our uniforms. State Patrol, sheriff's office and the Colorado Springs Police Department, our hearts are all broken," he said.

John Hickenlooper, Colorado governor, said the deadly violence against officers was having a grave impact on the state.

"We will once more come together to provide sympathy and strength for the deputy's loved ones and pray for the recovery of those injured," he said. "However, we also must come together and say enough is enough. We want each officer, every deputy, to know we are grateful for their service."

Adams County Deputy Heath Gumm was killed on January 24 and Douglas County sheriff's Deputy Zackari Parrish was killed on New Year's Eve.

Monday's shooting occurred in a neighborhood of single-family homes, apartments and retail stores just east of downtown Colorado Springs, a city of about 465,000.

Television coverage showed dozens of emergency vehicles responding to the scene.