Phoenix Mercury center Brittney Griner reacts in the second quarter against the Chicago Sky during game one of the WNBA Finals at US Airways Center, Sep 7, 2014. [Photo/Agencies]

The agent said the man also stabbed one of Griner's teammates, but she was wearing two jackets and the knife didn't go through.

Colas said the man was yelling as he chased the players onto the bus. She said he left the scene, and then returned covered in blood and was apprehended by Chinese authorities. It was not immediately clear in which city this happened.

Griner played Tuesday night against Liaoning Hengye and had 19 points, 11 rebounds and six blocks. She posted a video and statement on her Instagram account after the incident saying she was fine.

"First let me say I'm ok!!!! ... Let's just say I'm ready to get out of this city we're visiting," Griner said on Instagram. "Life can be took at any moment! Cherish every moment!"

Colas said that the team will review its security protocol after the incident.

Griner plays in the WNBA with the Phoenix Mercury and helped the team win a championship this past September. She led the league with a record 129 blocks and was the WNBA Defensive Player of the Year. She also helped the US win a gold medal last month at the world championship.

"We are thankful Brittney and her teammates are all okay after this incident," the Mercury tweeted from their team account.

This is Griner's second season in China and first with the Beijing Great Wall.

She led Baylor to a 40-0 season and the 2012 NCAA title. She was the No. 1 pick by the Mercury in the 2013 draft.