Three people were killed in a shooting in Thornton, Colorado on Wednesday.

The Thornton Police Department said on Twitter that two men were killed, while a woman was injured but later died in hospital.

Police have released no information about the circumstances of the incident, but said nobody had been taken into custody in relation to the incident that occurred in a Walmart store.

Police were called to the store at 6.30pm, but shooting ceased by the time they arrived at the scene.

Thornton is a city with a population of 120,000 people and is situated 10 miles Northeast of Downtown Denver.