STUTTGART, Germany — A U.S. soldier is under investigation following allegations that he injured multiple German police officers during a brawl at a disco in Mannheim, German law enforcement authorities said.

At about 4 a.m. Sunday, the soldier intervened while police attempted to detain an aggressive 31-year-old who was resisting arrest at an unnamed club in the downtown “T-square” area, Mannheim police said in a statement Wednesday.

When the suspect was brought to the ground to be handcuffed, the uninvolved 33-year-old service member jumped into the melee, police said.

The soldier dragged the police officers away from the 31-year-old and began punching the arresting officers, police said. During the fight, the officers lost their footing and fell down a flight of stairs with the service member, police said.

The soldier was finally overpowered by additional police officers and taken into custody.

The soldier is assigned to the 240th Composite Supply Company in Baumholder, the 21st Theater Sustainment Command said in a statement Wednesday.

“The incident is under investigation, and pertinent jurisdictional decisions have yet to be made,” the command said.

Typically, the U.S. military handles legal proceedings when service members run afoul of the law in Germany, but that is not always the case.

Two police officers were injured in the fall and had to be taken to a hospital for further medical treatment, police said. One officer has since been released while the other suffered significant injuries to his hand and will not be able to work for the foreseeable future, police said.

Police said a blood test showed the soldier was under the influence of alcohol during the fight. The soldier was later transferred to military police authorities in Kaiserslautern, German officials said.