NASHVILLE (AP) — What initially appeared to be another mass shooting at a movie theater ended up being an attack by a disturbed homeless man who wasn't armed with a real gun and was eventually shot and killed by police.

Vincente David Montano, 29, bought a ticket for "Mad Max: Fury Road" at a theater in a middle-class community in southern Nashville on Wednesday and entered with pepper spray, an airsoft pellet gun, and an ax, Metro Nashville Police spokesman Don Aaron said.

Some of the theater-goers in the audience ran outside and alerted police officers who had responded to a vehicle crash nearby, police said in a news release.

South Precinct Officer Jonathan Frith, a six-year veteran, was the first officer to encounter Montano, the news release said. Montano pointed his pellet gun at Frith and pulled the trigger, prompting Frith to fire one round from his patrol rifle in self-defense, the release said. Frith then backed out of the theater while keeping Montano contained inside as SWAT officers responded.

At that point, Montano began to use the pepper spray and officers said they encountered a cloud of it as they entered to take Montano into custody. Montano fired his pellet gun again and four SWAT members fired back, the release said. Montano attempted to flee out the rear door of the theater and as he emerged with ax in hand and started toward officers, five opened fire, according to the release. Montano was struck and killed.

No one other than Montano was killed. One man was cut on the shoulder, evidently by the ax Montano was carrying, and that man, his wife and daughter were treated for pepper spray, Aaron said.

Aaron said police had not uncovered a motive, but he said Montano had been committed for psychiatric treatment at least four times, twice in 2004 and twice in 2007. It wasn't immediately clear why he had been committed or if that commitment was involuntary.

"This individual has had significant psychiatric or psychological issues," Aaron said.

Just two days before the attack, Montano's mother, Denise Pruett, contacted police in Murfreesboro and said Montano was missing. She told police her son was diagnosed with paranoid schizophrenia in April 2006, according to the missing person report.

The Murfreesboro report says Pruett brought with her a copy of a Tennessee ID card for Montano that listed an address for Nashville Rescue Mission, a homeless shelter. The report lists his address as "homeless" and says he "has a hard time taking care of himself."

As more details of the attack and Montano's troubled past emerged, it began to appear less likely he intended to inflict mass casualties such as those attempted by a theater shooter recently in Louisiana and carried out two years ago by a shooter in Colorado.

Instead of a packed house showing a newly released popular film, Montano waged his attack in a theater where only seven others were present at midday, watching a movie that had already been out for some time. He was armed with a pellet gun, not a weapon with bullets, and chose to use pepper spray, not the gun, when he began his assault. One of Montano's two backpacks was detonated and found to contain a fake bomb, Aaron said. The other backpack contained nothing harmful, according to police.

It is impossible to say for sure whether Montano knew the pellet gun would easily be mistaken for a pistol, which is exactly what authorities say happened. Aaron said the responding officer thought the gun was real and that he heard popping noises when Montano pulled the trigger, prompting him to fire his service weapon.

"The gun is a very realistic looking gun that strongly resembles a semiautomatic pistol," Aaron said. "If someone confronted you with it, you would think it was a real pistol."

The violence at the Carmike Hickory 8 complex comes about two weeks after a 59-year-old drifter opened fire inside a movie theater in Lafayette, Louisiana, fatally shooting two before killing himself. It also happened while jurors in Colorado decide whether the man who killed 12 and wounded 70 others during a theater shooting in 2012 should get the death penalty.