Waco Police were searching Wednesday for four men who robbed the Walgreens store at 4100 Bosque Blvd. just before 4:30 a.m.

They walked into the store with their hands and faces covered, assaulted two customers, and tried to steal narcotics from the pharmacy, witnesses told investigators. When they failed to get the drugs, they robbed two cash registers instead and made off on bicycles with an undisclosed amount of money.

The thieves did not display any weapons, and the customers they assaulted did not need medical treatment. Waco Police Sergeant Patrick Swanton said three employees and three customers were inside the store during the robbery, and one of the customers called 911.

Descriptions of the robbers varied, so police were intentionally vague with information. Sgt. Swanton said he believed all four thieves were black, wore dark clothing and had some form of face coverings.

Wednesday's theft was eerily similar to a Jan. 24 robbery at the same store. There were also four thieves in that case, and they stole drugs and cash. They used a light-colored, two-tone vehicle as their getaway car.

"We're certainly looking into the possibility they're related, but it's too early to confirm," Sgt. Swanton said.

If you have any information that could help detectives with either case, please call Waco Crime Stoppers at 254-753-4357 or submit an anonymous tip online by clicking here. You could be paid a cash reward of up to $2,000.