Las Vegas ? A “distressed” gunman on a balcony at the New York-New York casino opened fire on gamblers below early Friday, wounding four people before he was tackled by off-duty military reservists. A fifth person was hurt in a crush of people fleeing the casino.

The gunfire, which erupted about 12:45 a.m., touched off a human stampede as tourists and gamblers tried to get out of the line of bullets. As they ran from the building, they jumped over slot machines and knocked over chairs.

Steven Zegrean, 51, of Las Vegas, was arrested and was expected to face felony charges including attempted murder, battery with a deadly weapon and discharging a firearm in an occupied structure, Las Vegas police Capt. James Dillon said.

He is expected to make an initial appearance in a Las Vegas court on Monday, a court official said. Zegrean did not yet have an attorney late Friday afternoon, and was held without bail under suicide watch.