Three people were killed and four were wounded in a shooting Monday evening at a local government building in Monroe County, Pennsylvania - The shooter Rockne Warren Newell, 59, is in custody after being shot.

A gunman opened fire at a town supervisors meeting Monday night in Pennsylvania, killing at least three people, before he was tackled by a local official and shot with his own weapon, authorities said. Three other people were wounded, including the gunman.

Gunshots were reported at 7:20 p.m. ET at the regular monthly meeting of Ross Township supervisors in Monroe County, state police said at a news conference. Two people died at the scene, and a third died at a hospital, state police Capt. Edward Hoke said at a news conference.

Hoke initially said a fourth person had died, but police later corrected that information to say the fourth person was in surgery. A sixth person sustained a grazing wound in the head and was reported in good condition, and a seventh suffered a heart attack from stress, Hoke said.

Police identified the suspect as Rockne Warren Newell, 59, of Ross Township. He was released from a hospital and was in custody, Hoke said.

The gunman approached the Municipal Building firing an unspecified long weapon into the windows, Hoke said. Fifteen to 18 members of the township's Supervisors Council and the public were present.

The gunman entered the building, still firing, before he briefly left and returned with a handgun, police said. He was tackled by two people and restrained until police arrived.

Chris Reber, a reporter for The Pocono Record who was attending the meeting, told his newspaperthat Bernie Kozen, executive director of the township's West End Open Space Commission, tackled the gunman and turned his own gun on him.

"I ran out after the first round of shooting. I dropped to the floor. That's what everyone did," Reber said.

"It was automatic, like a string of firecrackers. That's what everyone said.

"Then it stopped and I crawled out the side door."

The Record reported in June that Newell has been in a dispute with the township for 18 years over the condition of his property. A Monroe County judge ordered him to vacate the property a year ago.

"They have no right to kick me off my property," Newell told the newspaper in June. "They call my property an 'eyesore.' When I bought it, it was one of only three properties on the entire road that didn't have what they call 'junk.'"