(KRON) -- An investigation is underway after a man died Wednesday night following an alleged physical altercation involving multiple adults in the front parking lot of Sun Terrace Elementary School, according to Concord police. Milpitas teen fatally stabbed in fight with another 17-year-old Police s aid officers responded around 5:20 p.m. to 2448 Floyd Lane and located an unresponsive man on the ground. Police, community members and medics provided aid until he was taken to a nearby hospital, where he was later pronounced dead. "The Concord Police Department Major Crimes Unit responded and is actively investigating the incident, working in partnership with staff from the Mt. Diablo Unified School District," said authorities in a social media post. "The individuals present during the altercation have been identified, interviewed, and are cooperating with the investigation." Police said no outstanding suspects are being sought, and there is no public threat. It is not yet clear what led to the man's death. Anyone with information tied to this case is strongly encouraged to contact Detective Raul Alvarado at (925) 603-5820. ...read more read less