SOUTHFIELD, Mich. -

Bus stops are usually filled with people on the move. They should be safe spaces for commuters, but a source tells the Local 4 Defenders that a man on a bike has been targeting people waiting for the bus in the suburbs and the city.

He's after one thing -- their money.

"It makes me feel unsafe," said Jhara Johnson of Detroit. "I take this [bus] every day."

Most of the incidents have been reported by people who've waited at bus stops along Southfield Road. Other robberies reportedly have occurred on Greenfield Road.

The suspect is described as a white man, aged 20-25. He reportedly rides a blue bike and has been seen wearing black clothing and a white cap. He allegedly approaches victims with some small talk before he then demands cash. The situation is a concern for bus riders like Robert Smith of Southfield.

"It's crazy because you think you can go to work safely and you come to the bus stop and have to worry about being robbed or killed or something like that," Smith said.

Police have stepped up patrols in some cities where these robberies have allegedly taken place and people like Smith say this news just another reminder about the importance of always being alert.