An East Boston teen walked into a Boston Police station early this morning to admit strangling a man found dead in a Saratoga Street blaze Monday, a Suffolk County homicide prosecutor said during his arraignment on murder charges today.

MARCO TULIO FLORES (D.O.B. 10/3/93) of East Boston is charged with murder in connection with the adult male’s death Sunday night or yesterday morning. The victim’s name and age are being withheld until investigators can conclusively determine them.

In recommending that Flores be held pending trial, Assistant District Attorney Ian Polumbaum told East Boston District Court Judge Roberto Ronquillo, Jr., that investigators first learned of the death when Boston firefighters responded to 877 Saratoga St. yesterday morning shortly before 8:00 for a fire in the basement of that two-family building.

Amid the smoke and flames, Polumbaum said, they found a person on a bed. They pulled that person out of the bedroom to a common area in the basement. One firefighter suffered a back injury pulling the person out of the room.

“They discovered the body was that of a man,” the prosecutor told the court. “They discovered that he was dead. They discovered that he had been partially bound with duct tape.”

Firefighters notified Boston Police, who had also responded to the scene. When the fire was extinguished, police seized the building and later executed a search warrant. The man’s remains were transported to the Office of the Chief Medical Examiner, where an autopsy is ongoing, Polumbaum said.

“At about 1:30 this morning,” Polumbaum continued, “the defendant before you walked into the police station and said he was the person responsible.”

Homicide detectives gave Flores a “careful, thorough” Miranda warning, after which he gave an extensive statement, Polumbaum said.

Flores allegedly told police that he’d known the victim for “many years” and had gone with him to his bedroom on Sunday night. Flores allegedly described a confrontation there in which he duct-taped and strangled the victim.

“He said he doused the victim with a flammable liquid,” Polumbaum said, noting that a container of such a liquid was recovered at the scene. Flores allegedly told investigators he then left the scene but returned later and set the fire.

“The victim was badly burned, as was the bed,” Polumbaum said.

Kara Hayes is the DA’s assigned victim-witness advocate. Flores, who is held without bail, is represented by attorney James Budreau and will return to court on June 28.