Chicago police on Tuesday were investigating a burglary on Milwaukee Avenue in Chicago's Logan Square neighborhood.

Police said at 4:29 a.m., four people smashed through the front glass door of a business and stole cash once they got inside. Video showed the front door smashed at Innjoy Logan Square, a sports bar at 2200 N. Milwaukee Ave. at the intersection with Attrill Street.

After burglarizing the bar, the thieves then got into a black sedan and fled southeast on Milwaukee Avenue, police said.

Cellphone video from someone who lives nearby showed the men trying to put a safe into the trunk of the car before they left. When the safe wouldn't fit, the thieves tried the back seat. This did not work either, so they gave up.

CBS News Chicago crews spotted the safe lying on the pavement on Attrill Street outside Innjoy, after the burglars were gone.

Another business was burglarized at 4:30 a.m. Tuesday in the 3500 block of West Fullerton Avenue, also in the Logan Square neighborhood. In that incident, four men also smashed into a business, stole money. They fled eastward on Fullerton Avenue in a black sedan.

Police have not specified whether they believe the two burglaries are related.

Investigators said no one was in custody in either burglary Tuesday morning. Grand Central Area detectives are investigating.