Two employees of an Arby's (search) fast-food restaurant were found shot and killed after an apparent robbery, police said Monday.

Police Chief Eugene Oldenburg said two off-duty employees drove past the restaurant late Sunday night and thought the lighting appeared unusual.

One of the two employees was an assistant manager, and had a key, so they stopped, went inside, found the bodies of two workers who had been on duty and called police shortly after 11:30 p.m., the chief said.

"It appears to have been a robbery," Oldenburg said, but he did not disclose any further details as to why authorities believed that was they case.

Oldenburg said he understood the store would have normally closed at 9 p.m., and he said there were no signs of forced entry.

Those dead were described as a 24-year-old woman and a 17-year-old boy, but Oldenburg did not immediately release their identities. He said autopsies were planned Monday.

Police did not immediately have any suspects in the case and asked anyone who may have seen anything unusual at the restaurant Sunday night to call them.

The restaurant is located about a mile south of Milwaukee's Miller Park (search), where the Milwaukee Brewers (search) play. There has been business development there near residential neighborhoods.

Robert Block, 71, who lives across street from the restaurant and has resided in the area since 1973, said he normally only locks his front door.

"I think I'll be locking my back door from now on," he said.

Block said he did not hear anything Sunday evening except when law enforcement officials arrived on the scene.

"I'm going to be a little worried from now on. Maybe I'll keep looking out here from now on to see what happens," he said.

Allen Omick, 65, who lives about a half a block away from Arby's, said he was surprised he did not hear the shootings because he normally hears everything that is going on in the neighborhood.

"It's scary, but it's human nature," he said of the shootings. "You can't live in a shell."

"It's not something you expect in your neighborhood."

Omick said he hopes the shootings are not the start of a lot of crime because he said he would hate for it to hinder development, which helps keep his taxes down.