A warning not to drink the water in a Colorado town has been cancelled after tests showed there is no longer any evidence of a marijuana chemical in the tap water.

The Lincoln County Sheriff's Office said Saturday that a criminal investigation is continuing into suspected tampering and forced entry at a Hugo community well. The investigation has been turned over to the Colorado Bureau of Investigation.

Bottled water was distributed to residents of the town after officials said Thursday that some field tests had found THC, marijuana's psychoactive ingredient, in the water, and more tests were ordered.

No illnesses have been linked to the water in Hugo, a town of about 730 people some 100 miles southeast of Denver, according to Lincoln County Public Health Director Susan Kelly.