A hostage situation in Aurora, Colo. has resulted four people dead, including perhaps the gunman.
As many as 40 officers, including SWAT teams and hostage negotiators, were on scene at the home in Aurora, Colo.

An "armed and dangerous man" was fatally shot by police on Saturday after barricading himself inside a suburban Denver home where three people were found dead, investigators said.

A fifth person inside the home was able to escape.

Officers were called to the townhome in Aurora, Colo. around 3 a.m. after reports of shots fired, Sgt. Cassidee Carlson told the Daily News. An "armed and dangerous" man was inside the home and refused to surrender to police, she said.

After a nearly six hour standoff, officers shot and killed the suspect and discovered three bodies inside the home, police said. It was unclear how and when those victims were killed.

Streets leading to the home were closed off as police tried to seal the scene. Neighbors told local media that they smelled tear gas.

As many as 40 officers, including SWAT teams and hostage negotiators, had responded to what police called an "intense" scene.

Hostage negotiators spoke briefly on the phone with the suspect and tried to negotiate an end to the standoff, Carlson said. The other adults trapped in the house were not able to "come out of their own free will," she said.

"We are just trying to do things as safely as possible at this point," she said.

The identity of the victims and what prompted the incident is still unclear.