Cops in Oceanside, CA are investigating a possible shooting involving former NFL star Junior Seau ... law enforcement sources tell TMZ.
We spoke with an investigator in the coroner's office .. who told us they got a call to respond to the scene ... though the details surrounding the situation are still unclear.
Cops are currently at a residence where 43-year-old Junior is believed to be staying.
People in law enforcement are telling us Junior Seau is dead ... but we are unable to confirm that right now.
Attempts to reach Seau and Seau's people have been unsuccessful.
Seau was involved in a car accident back in 2010 when he drove his SUV off a cliff in Carlsbad, CA hours after he was arrested for allegedly attacking his girlfriend. Seau later said he was not trying to kill himself ... insisting he had fallen asleep at the wheel.