HOUSTON -- Police need help finding as many as four men who were involved in three robberies in a 90-minute period, KPRC Local 2 reported Thursday.

Houston police said the group drove around north Houston on Oct. 30 and held four people up at gunpoint. Officials said the men fired shots during two of the robberies.

At 8 p.m., the group robbed and assaulted a 25-year-old man in the 1400 block of Kress Street.

At 9:15 p.m., the group robbed two people as they were getting money out of a drive-through automatic teller machine in the 5200 block of Airline Drive. One of the men fired a shot at the victims, police said.

At 9:30 p.m., the group robbed a female employee of the Astro Inn in the 100 block of Cavalcade Street. She was behind a payment window when one of the men opened fire, police said.

None of the victims were wounded, officials said.

The men were seen in a black or dark blue four-door Honda with a sunroof and one hubcap on the front right tire. The other three caps are blacked out.

The driver was seen with a tattoo of his star on his neck. Detailed descriptions of the men were not released.

Anyone with information is asked to call the HPD Robbery Division at 713-308-0700 or Crime Stoppers at 713-222-TIPS.