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Alexis Arquette died Sunday morning, RadarOnline.com has learned.

The transgender activist passed while surrounded by her family, according to her brother Richmond’s Facebook post. Other details remain unclear.

A source close to the Arquettes told Radar, “she was in a coma for four days at Cedars and no one was allowed to see her except for family.”

Arquette was born Robert, and transitioned from male to female in 2006. The entertainer’s transition was documented in Alexis Arquette: She’s My Brother.

David, Patricia and Rosanna Arquette have not commented yet.

Story developing.

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