OAKLAND COUNTY, Mich. -

The Oakland County Sheriff's Department arrested four people Friday who they believe were involved in a string of robberies and attempted killings over a 24-hour period.

A 26-year-old Auburn Hills man, a 16-year-old male, 17-year-old male and an 18-year-old woman were arrested, and police are now looking for a fifth suspect.

The first of four robberies occurred Wednesday around 11 p.m. when the group took $130 from a man and woman at gunpoint.

In the second robbery, officials say the group attempted to shoot a victim, but when the trigger was pulled, the gun jammed.