HOUSTON -

Four people have been arrested in connection with a six carjackings in northwest Harris County.

Harris County Precinct 4 deputy constables said the group was captured early Thursday.

Investigators said that at about 2:30 a.m., they received a call from a driver who said his car had been taken at gunpoint on Cutten Road near Cherry Hill Drive.

Deputies said they caught up with the stolen vehicle and chased it a short distance.

The driver slammed into a large boulder on F.M. 1960 near Champion Forest Drive and three men and a teenager jumped out, investigators said.

Detectives said they set up a perimeter and they later captured the three men. A passerby who carries a concealed handgun license held one of the suspect until deputies arrived, officials said.

Investigators said the group used a car to block the driver at the intersection of Cutten and Cherry Hill. The group left that car behind at the intersection, and deputies said it had been reported stolen during a robbery in the 12000 block of Windfern. Detectives said the owner of that car had been beaten during the robbery.

Investigators said the group was also responsible for four other carjackings that were being investigated by the Harris County Sheriff's Office. Details about those attacks have not been released.

The names of the three men involved have not been released because of the pending investigation. The name of the teenager will not be released because he is a juvenile.

All four suspects will face aggravated robbery charges.