Thornton family, mom, dad and 2-year-old girl, missing from their home.

A Thornton family — parents and a 2-year-old girl — have been reported missing, and circumstances surrounding their disappearance are a mystery, police said.

The family was last seen early Monday at their home, 4056 E. 130th Way, according to police.

The couple has a 5-year-old child who was left home alone at the residence, said Matt Barnes, a police spokesman. Extended family members who live nearby found the child alone and unharmed in front of the home about 9 p.m. Monday.

Extended family members reported the trio missing to police Tuesday night.

Police are looking for Zaiqiao Feng, 48, Liu Nei Li, 40, and their daughter Anna. The family left their home in a 2008 gray Toyota Highlander, Colorado license plate 231-REZ.

Investigators are seeking the public’s help in locating the family or their vehicle. Anyone with information on their whereabouts is asked to call police at 720-977-5150.

“We don’t have any indication of foul play at this time,” Barnes said.

Police are describing the incident as mysterious.