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.
Edit: Seau's death has been confirmed via multiple news sources. Here's the LA Times article...