Several people have been killed in a gun attack at a Walmart supermarket in Virginia.

The police, who arrived at the scene shortly after 10 p.m. local time on Tuesday evening, according to CNN, have not yet been able to quantify the exact number of those killed.

But she assumes that there are "less than ten" people.

As the Chesapeake city government announced, citing the police, a gunman shot people in the supermarket on Tuesday evening - two days before America's most important family holiday Thanksgiving.

The attacker himself is now dead.

"Our understanding is that there was only one gunman and that he is dead," a police spokesman told NBC News.

He added that it is not yet clear how the shooter was killed.

He said the officers were not known to have been shot.

According to the current state of knowledge, the officers did not use their firearms.

It is not yet clear whether some of those killed or the attacker himself belonged to the supermarket staff.

According to CNN, citing information from an officer at the scene, there is reason to believe the shooter was an employee or former employee at the Walmart supermarket.

He is said to have opened fire on other employees in a break room.

Police believe the gun attack took place at the supercenter itself.

However, a dead person was found outside the supermarket.

It is a very big business, the search for other victims or people who may have been hiding is still ongoing.

Nothing was initially known about the background.

Walmart said in an initial response, "We are shocked by the tragic incident at our Chesapeake, Virginia location.

We pray for those affected.”

Last weekend, five people were killed and 18 others injured in a shooting at a nightclub popular with gay, lesbian and trans people in Colorado.