Prince George’s County police detectives are treating the case of a man who died after a fight last month as a homicide, and they are holding two suspects on assault charges while they consult with prosecutors about the case, authorities said.

Teddy Kaikai Marchant, 26, and Alhaji Abu Bakarr, 36, are both being held in connection with what has now been ruled the slaying of Aiah Nyanga Tongu, 34, of Greenbelt, authorities said. Police said the three men were involved in a fight on March 18, and that Tongu died later that day at the hospital.

Police were not tipped to the fight, though, until after Tongu came to the hospital complaining of trouble breathing, said Capt. Steve Yuen, a county police spokesman. After that, Yuen said, investigators “started backtracking” and found the Tongu had been involved in a fight with Marchant and Bakarr in the 9700 block of Martin Luther King Jr. Highway in the Lanham area earlier in the day.

The medical examiner told police on Wednesday that the case had been ruled a homicide. Yuen said detectives are consulting with the state’s attorney’s office to possibly upgrade the charges against Marchant and Bakarr, who remain jailed.