LOWELL -- Lowell police are investigating the unattended death of a 22-year-old man inside a home on Carolyn Street, detectives said on Tuesday.

Capt. Kevin Sullivan said the investigation is standard procedure since all unattended deaths are probed. Sullivan said there are no outward signs of foul play, but that police are awaiting toxicology results to be sure the death was not suspicious, especially due to the age of the male involved.