Team USA gymnast McKayla Maroney says she was assaulted by Dr. Larry Nassar

MICHIGAN -- (WXYZ) -- Olympic gold medal gymnast McKayla Maroney says she was assaulted by former Michigan State and Team USA Dr. Larry Nassar.

In a post on Twitter early Wednesday morning, Maroney, 21, wrote "I was molested by Dr. Larry Nassar, the team doctor for the US Women's National Gymastics Team, and Olympic Team.

"Dr. Nassar told me that I was receiving 'medically necessary treatment that he had been performing on patients for over 30 years,'" she added. "It started when I was 13 years old, at one of my first National Team training camps, in Texas, and it didn't end until I left the sport."

Nassar is accused of sexually assaulting dozens of women and girls that were involved in the Team USA gymnastics program. Several of her teammates have also accused Nassar of sexually assauting them when they were minors. Maroney is the most well-known gymnast to accuse Nassar so far.

"It seemed whenever and wherever this man could find the chance, I was 'treated,'" she said. "It happened in London before my team and I won the gold medal, and it happened before I won my silver."

Maroney then went on to describe what she said was her "scariest night" of her life when she was 15.

"I had flown all day and night with the team to get to Tokyo. He'd given me a sleeping pill for the flight, and the next thing I know, I was all alone with him in his hotel room getting a 'treatment,'" she said. "I thought I was going to die that night."