Officials have performed an autopsy on a Louisville man who died after police used a taser on him to break up a fight.

But a deputy coroner says more testing is needed to determine the cause of death.

Police say 34-year-old Isaac Bass and his brother were fighting when officers arrived Wednesday night.

Police spokeswoman Alicia Smiley says Bass went into a "medical emergency" after a police officer shocked him with a Taser.

Deputy Coroner Sam Weakley says Bass was pronounced dead at 10:40 p.m. EDT in the emergency room of a Louisville hospital.

Weakley says further microscopic and toxicological tests are needed to determine the cause of death.

The two officers who responded to the fight have been place on administrative leave.