CASTLE ROCK, Colo. -- Authorities safely detonated two devices found inside a home on Monday night, the Castle Rock Police Department said.
It came after officers found a small collection of chemicals in a home in the Plum Creek neighborhood on Monday morning. About 30 homes were evacuated and some spent the night at a Red Cross shelter at the Douglas County Fairgrounds.
Residents were able to return at 5 a.m. Tuesday.
Officials said the Douglas County bomb squad and Bureau of Alcohol, Tobacco, Firearms and Explosives found the devices in the home. Officials detonated both at Plum Creek Golf Club as a safety precaution.
Investigators will return to the home Tuesday morning. The residents are cooperating fully, officials said.
Police found the chemicals at the home after being led there following the arrest of two juveniles on Sunday night.
Police said one of the teens had "extensive knowledge" and some of the devices used were illegal. Officials said the devices were never completed but were close to being bomb.s
"I have never seen this level of sophistication from a juvenile," police said.
Police went to the home in the 400 block of Prestwick Way to tell the parents of their child's arrest. While there, police found the small box of chemicals that appeared suspicious and called in hazardous materials crews.
Officers went to the area on Sunday night after neighbors reported suspicious behavior from two juveniles. Both are in custody on unknown charges unrelated to the chemical investigation.
Because they are younger than 18 years old, their names, ages and pending charges were not released. Police have not said if the juveniles are boys or girls.
Police initially said it was an isolated incident and there was no danger to the public.
However, at about 2:20 p.m., police said they were evacuating the neighborhood. An evacuation center was set up at the Douglas County Fairgrounds (500 Fairgrounds Drive).