🚨 Chilling Update From Police… b See more

Long-serving GOP Sen. Lindsey Graham, 71, of South Carolina passed away early Sunday, stunning President Donald Trump and the political establishment from Washington, D.C., to the Palmetto State.

Trump announced Graham’s sudden passing on Truth Social, writing: “Senator Lindsey Graham, one of the greatest people and Senators I have ever known, is dead!

“He was always working, and was a true American Patriot. Lindsey will be greatly missed!!! DETAILS AND ARRANGEMENTS TO FOLLOW. So sad!” Trump added.

Now, Graham’s possible cause of death has been revealed.

According to NBC News, Graham passed after Saturday night “from a brief and sudden illness.”

“Senator Graham’s family appreciates prayers at this time and asks for privacy during this incredibly difficult period,” said a statement from the family.

Emergency responders were dispatched to Graham’s Capitol Hill residence Saturday night after receiving a call reporting a possible “cardiac arrest,” according to police scanner audio obtained by NBC News.

Photographs reviewed by NBC News show paramedics transporting an individual on a stretcher from the home to a waiting ambulance.

Police vehicles and fire trucks were also present at the scene.