WATCH: 3 Masked Gunmen Rob Wyandotte Bar

Men are sitting around the bar, with their beer bottles in front of them. Couples are sitting at tables, some appear to be laughing with one another while others appear to be chatting with waitresses as they walk by.

Little do they know that in a few seconds, their night will drastically change.

When the time stamp on the video ticks past 22:36, three masked gunmen rush into the back door of the bar. Almost instantly, one fires a shot into the ceiling while others walk around the bar, pointing their guns at anyone in their way.

The three were in the bar for less than 90 seconds, but during that minute-and-a-half, they pulled a barmaid to the ground by her hair, pistol whipped a male customer and shoved a few more.

The same men are said to be responsible for similar incidents and a bar in Southgate. It's estimated that they've gotten away with about $10,000 in cash.

"They've struck three times now and we're really concerned that someone is going to get hurt if they aren't caught and caught soon," Wyandotte Police Chief Daniel Grant said. “We’re worried if this keeps on, they could become more violent. We don’t want to see this escalate any further.”

Detectives from the three police departments have been meeting regularly over the last week to compare notes and discuss tips each department has been receiving.

Quit-N-Time owner Kevin Ward declined to talk about the incident.

"We just want to get it behind us," he said.

Anyone with information on the robberies is asked to call Wyandotte police at 734-324-4438, Dearborn police at 313-943-3012 or Southgate police at 734-258-3061.

The surveillance video from inside Quit-N-Time, which was released by Wyandotte police, covers the same time period from several camera angles inside the bar. The robbery occurs approximately from the 22:36 to 22:38 time stamps.

Here's a rundown of what the video shows:

At
You see ... :03
A gunman enters the screen from the top left corner. He aims a gun directly at a waitress and then sweeps it over toward customers. The people sitting at the bar drop to the floor after another gunman, who is behind the bar, fires a shot into the ceiling before grabbing money out of the cash register. :27 This is another angle from the main bar that shows the three gunmen entering and heading in different directions. :44
The three gunmen rush into the back door. One pushes in a woman who was entering the bar right before them, while the other two gunmen pull in two men who were trying to leave at the same time. The gunmen immediately start to point their weapons at everyone inside. Customers can be seen falling to the ground. Less than 90 seconds later, the gunmen run out the same door. One of them is clutching the bar's cash box as he leaves. 1:05
Two waitresses run into the back office to tell management that the place is being robbed. Two men hop up and start to head out, but are soon confronted by a gunman who makes his way to the back office. He points at the employees inside the office. One of the men hands him the bar's cash box and he flees. 1:28
One of the gunmen jumps over the bar and can be seen struggling with a waitress and pointing his gun at everyone around him. 1:40
A gunman jumps behind the bar and grabs a waitress. A male employee runs to help her, but after seeing the man is armed with a gun, resists any kind of altercation. The gunman fires a shot into the ceiling as he drags a waitress to the floor by her hair. He empties the money in the cash register and then walks down the bar, reaches over and uses his gun to strike a customer. The gunman goes back to the register to grab some more cash, but in the process, dumps money on top of the waitress he pulled to the ground. Another gunman on the other side of the bar can be seen grabbing a man's shoulder and pointing his gun directly at him. 2:28
Wyandotte police officers arrive. 2:33
A woman is about to enter the bar when one of the gunmen runs up to her and forces her inside. The two other gunmen follow, making their way into the bar after first looking around. Within seconds, the three gunmen make their way out of the bar, running north down the back alley. Customers soon file out, appearing to be looking for the gunmen.  

UPDATE: This story and video was revised at 2:30 a.m. Saturday, Feb. 25 to show a condensed version of the events inside Quit-N-Time.