Alexis Rivera, a transgender rights advocate, has died at the age of 34.

According to various media reports, Rivera died on Wednesday, March 28 in San Francisco due to complications related to HIV.

Rivera was the first program director for Children's Hospital Los Angeles' groundbreaking Tranny Rockstar program, where she helped hundreds of transgender youth. She also served as Commissioner for the Los Angeles County Commission on HIV/AIDS; founding board member of FTM Alliance of Los Angeles; chair of the Transgender Service Provider Network; and founding member of the League of Trans Unified Sisters (LOTUS), according to an online bio.

She joined the Transgender Law Center as its Policy Advocate in 2007.

“Words can barely express the grief experienced by California's trans communities this week,” Masen Davis, executive director of Transgender Law Center, said in a statement. “A proud trans Latina and natural leader, Alexis Rivera was a role model and inspiration for countless youth – and many 'elders' too. She understood that we are stronger together, and she kept organizing until the very end. Alexis' death is a reminder that the fight for equality – and against AIDS – is far from over.”

Memorials for Rivera will be held Saturday in San Francisco at the SF LGBT Center and Sunday in Los Angeles at the Fiesta Hall at Plummer Park.