Story highlights Joan Laurer, also known as Chyna, was 45

Police say her body was found Wednesday

Foul play is not suspected in her death

(CNN) Joan Laurer, the groundbreaking female wrestler known as Chyna, has died.

Police in Redondo Beach, California, confirm that Laurer, 45, was found dead in her apartment on Wednesday. Police say they were notified by a friend who went to check on her and found Laurer unresponsive. The cause of death is under investigation, but police say there are no signs of foul play.

Chyna and wrestler Triple H pose for a photo in 1999.

"It is with deep sadness to inform you that we lost a true icon, a real life superhero. Joanie Laurer aka Chyna, the 9th wonder of the world, has passed away," said a post on her website

After graduating from the University of Tampa, Chyna started training in the world of professional wrestling and in 1996 was named the "Rookie of the Year for the Women's Championship," according to her website. She wrestled in the Royal Rumble and King of Ring tournaments and became the only undefeated Women's Champion in WWF (World Wrestling Federation) history.