Calgary police are asking for the public's help to solve a violent sexual assault that happened on Saturday evening near the Bridgeland LRT on Memorial Drive northeast. 

Police were called after a man discovered an injured 30-year-old woman in the bushes near the 600 block of Memorial Drive. He was able to run to the nearby C-Train platform to use the help button to alert police.

Bridgeland LRT station sex assault

The man who found a badly beaten woman in a wooded area near the Bridgeland LRT ran to the C-Train platform to use the help button to call for police. (CBC)

She was suffering from life-threatening injuries and was taken to hospital where she remains in stable but critical condition.

"She has very extensive injuries," said Staff Sgt. Bev Voros.

"She was beaten around the face. She was sexually assaulted very violently, so the injuries are quite severe."

Police say they have no suspects but are examining CCTV footage from the area.

Voros says the woman is currently unable to speak to police, so they cannot determine whether it was a random attack. Police are working with her family members to help piece together the night's events.

Police are asking anyone who was in the area between 6 p.m. and 10 p.m. MT that saw something suspicious to call 403-266-1234 or Crime Stoppers.

"The witness that we had there could hear someone about 15 feet away, and that's how he located her because he could hear her moaning and he wanted to see what it was and help her out," said Voros.

"So if he could hear that, then I am hoping that anyone who was walking on the pathways would have heard some kind of a ruckus going on in the bushes."