The fifth in a string of robberies at Sonic Drive-Ins took place Sunday night in Port Lavaca.

It is unclear whether or not the robbery Sunday night is connected to the four previous Sonic Drive-In robberies, said Detective Colin Rangnow with the Port Lavaca Police Department.

Shortly after 11 p.m., a man dressed in all black clothing attempted to gain entry to the Port Lavaca Sonic through the back door, Rangnow said. The door was locked, and the man waited behind dumpsters until a little after midnight before using a large rock to smash a glass door on the side of the building to gain entry, he said.

The suspect was in the building for 2 to 4 minutes. While in the building, the man brandished a small silver handgun, he said. No one was injured, and the man did not obtain any money or anything from employees before he fled out the back door, Rangnow said.

The suspect is still unknown but is described as a 5-foot-8-inch to 5-foot-9-inch man in his early 20s, Rangnow said. The suspect was wearing a black hoodie with a lion on the back and the No. 19 on the sleeve. He was also wearing a flat-brimmed cap.

The first known Sonic Drive-In robbery occurred in Wichita Falls on Dec. 21, said Captain Allen Taylor with the Gonzales Police Department. He said a Sonic Drive-in in Gonzales was robbed Dec. 26. The suspect in these cases still has not been identified, he said.

The Gonzales robbery appears to be connected to the two in Victoria, which happened Jan. 31 and March 5, Taylor said. He said he has not yet seen the footage from the robbery in Port Lavaca to know whether the suspect appears to be the same in that robbery as well.