(CNN) — A manhunt is underway for the person who killed a Virginia reporter and a cameraman live on air Wednesday.

Agents from the Bureau of Alcohol, Tobacco, Firearms and Explosives and FBI are investigating.

All schools in the Roanoke area near Moneta, where CNN affiliate WDBJ’s Alison Parker and Adam Ward were shot, are on lockdown.

As a precaution, and highlighting the fear about gun violence, New York City is stepping up security at its local television stations.

Authorities have a name and license plate number for a person believed to be the shooter, according to a law enforcement official.

The gunman is believed to have fired six or seven times, WDBJ General Manager Jeff Marks said.

Parker was interviewing a woman around 6:45 a.m. when the shots rang out and both women screamed.

As the camera fell to the ground, the audience got the briefest glimpse of a man who appeared to pointing a gun toward the downed cameraman.

The station cut away to a shocked anchor, Kimberly McBroom, back in the studio.

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