People exit Princess Anne Middle School, where friends and relatives were reuniting with loved ones in a building during the shooting on Saturday. (Photo: AP)

Washington: A disgruntled veteran public utilities employee stormed a government building in the US State of Virginia and fired indiscriminately on multiple floors at his co-workers, killing at least 12 people and wounding six others, police said on Saturday, in the latest incident of mass shooting in the country.

The gunman was killed when police responded to the shooting in Virginia Beach. The suspect, a long-term and current Virginia Beach city employee, fired “indiscriminately” on multiple floors in a public utilities building, police said.

Police chief James Cervera told reporters there was an exchange of gunfire with officers and a police officer whose ballistic vest stopped a bullet was injured. The shooting suspect was identified as DeWayne Craddock, acco-rding to a law enforcement official and a Virginia government source, CNN reported.

Craddock, 40, worked as a certified professional engineer for the city of Virginia Beach in the Public Utilities Depart-ment. He is listed on department news releases as a point of contact for information on local road projects over the past several years.

“This is the most devastating day in the history of Virginia Beach. The people involved are our friends, coworkers, neighbour, colleagues,” Mayor Bobby Dyer said. The shooter was a disgruntled employee, the report said, quoting a Virginia government source.

“The President has been briefed on the shooting in Virginia Beach, and continues to monitor the situation,” White House said.

“This is a horrific day for the Commonwealth of Virginia. We are devastated by the tragic shooting in Virginia Beach,” said Virginia Governor Ralph Northam after visiting the scene.

The shooting took place shortly after 4 pm within the sprawling Virginia Beach Municipal Center, a campus of city offices and agencies, including the Police Department, when the gunman entered the public works department building of the city’s municipal centre.

The attack unfolded on multiple floors in Building No. 2, which includes offices for planning and public works, among others, and is adjacent to City Hall.

Police found victims on every floor of the building, the police chief said, adding the identities of the victims were not immediately released nor was the motive of the attack.