A gunman blasted shots through the wall of a Pennsylvania municipal building during a meeting on Monday and then barged into the meeting room and continued firing, killing four people, before he was tackled by a local official and shot with his own gun, a witness said.

The shooting, which injured some other people, happened shortly before 7:30 p.m. during Ross Township's monthly meeting, Monroe County emergency management director Guy Miller said. The gunman, who appeared to be "shooting randomly," was captured and was treated at a hospital, which was placed on lockdown, he said. The shooter later was released into police custody, the hospital said.

State police in Lehighton confirmed the four deaths and said the gunman had an ongoing dispute with township officials over the possible condemnation of his property. They said at about 15 people were at the meeting.

The Pocono Record said one of its reporters was in the township building and a gunman armed with a pistol with a scope shot through a wall into the meeting, in a rural area of northeastern Pennsylvania about 85 miles north of Philadelphia.

The reporter, Chris Reber, told the newspaper that all he saw was holes go through the wall, with smoke and plaster blowing out. He said he heard automatic gunfire.

"I ran out after the first round of shooting. I dropped to the floor. That's what everyone did. ... Then it stopped and I crawled out the side door," Reber told the newspaper, which posted his account online. "I was the only person who crawled out. Everyone got behind a table. Some of the supervisors were over on the side throwing up."

Reber said a woman opened a door to the meeting room "and he (the shooter) was standing there. A man pushed her aside and was shot. People were shot inside the room."

The shooter returned to his car and came back inside with another weapon when a local official at the meeting grabbed him, Reber said.

"(West End Open Space Commission executive director) Bernie Kozen was there tending to the man and he (the shooter) didn't see them," Reber said. "Bernie bearhugged him and took him down. He shot (the shooter) with his own gun."

Rep. Matt Cartwright, who represents the state's 17th District, said he was "stunned and appalled at the atrocities that claimed the lives of innocent citizens in Ross Township." He said he had heard about what Kozen did to prevent more bloodshed.

"Mr. Kozen is a true hero tonight," Cartwright said in an emailed statement.

Kozen's wife, reached by telephone at their home Monday night, said he wasn't there and she was unsure when he'd be back.

Ross Township has about 5,500 residents. According to its website, the board of supervisors meets at 7 p.m. on the first Monday of each month.