MADISON, Wis. (AP) — A man who shot and killed two people and wounded a third at a northeastern Wisconsin tribal casino restaurant before police killed him had been fired from the eatery and banned from the property, authorities said Monday.

Bruce Pofahl, 62, walked into the Duck Creek Kitchen and Bar in Green Bay on Saturday and shot Ian Simpson, 32, and Jacob Bartel, 35, at a waiter station at close range with a 9 mm handgun as dozens of patrons looked on, Brown County Sheriff Todd Delain said during a news conference in Green Bay.

Pofahl then went outside and shot another restaurant employee, 28-year-old Daniel Mulligan, the sheriff said. A team of Green Bay police officers opened fire on Pofahl, killing him. Mulligan was in serious but stable condition at a Milwaukee hospital on Monday, Delain said.

The sheriff defended the officers’ decision to fire on Pofahl, saying “certainly this individual was a threat.”

The restaurant is part of a hotel and conference center that includes the Oneida Casino. Delain said Pofahl was fired from the restaurant earlier this year. He didn’t say why Pofahl was fired, but he said the attack was “targeted” and investigators were still piecing together Pofahl’s relationships with his co-workers.

Online court records show that a woman took out a restraining order against Pofahl in March, but the order didn’t include any firearms restrictions. The records didn’t list any other cases or charges involving Pofahl.

Oneida Chairman Tehassi Hill told WLUK-TV on Sunday that he was in “disbelief” and called the shooting “scary.” He said the tribe prohibits firearms on its properties but that “(mass shootings are) kind of a regular thing in this country.”