The Montgomery County Sheriff's Office has a suspect in custody in connection with an armed robbery at a McDonald's.

The robbery happened on October 11 in the 6700 block of Woodlands Parkway.

Employees said three men with handguns climbed through the drive-thru window at 8:45 p.m.

The trio got an unknown amount of cash and left the restaurant by going back through the drive-thru window.

Three days later, officers with the Houston Police Department notified the Montgomery County Sheriff's Major Crimes Unit, stating they had arrested a suspect the sheriff's office had been looking for in connection with the McDonald's robbery.

Houston police had arrested Justin Harris, 20, on an unrelated charge.

Based on evidence discovered during the investigation, the Montgomery County Sheriff's Office filed for an arrest warrant on October 15. The charge was for aggravated robbery in connection with the McDonald's robbery.

On December 4, Harris was transferred from the Harris County Jail to the Montgomery County Jail.

Montgomery County deputies are still looking for two more suspects in connection with the McDonald's robbery. Anyone with information is asked to call the Montgomery County Crime Stoppers at 800-392-STOP.