Washington

At least 10 people were killed when a gunman opened fire at a Walmart in Chesapeake located in the US state of Virginia on Wednesday.

A police spokesman said that the suspect, believed to be the store manager, opened fire then shot himself dead.

The shooting was believed to have happened inside the store, and that the suspect acted alone, the spokesman added.

The motive behind the attack is yet to be ascertained.

Reacting to the incident, Walmart said it was "shocked at this tragic event", adding that it was "working closely with law enforcement".

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The Tuesday night attack comes just days after a gunman opened fire at a LGBT nightclub in the US state of Colorado, killing five people and injuring 17 others.