One of the UFC's top female stars was arrested early Sunday morning.

Julianna Pena, a former winner of The Ultimate Fighter, was arrested and charged with two counts of assault by the Spokane (Wash.) Police Department, according to Cpl. Jordan Ferguson of the Spokane PD. She was arrested at 2:20 a.m., Ferguson said, and booked into the Spokane County Jail at 2:53 a.m. Sunday morning, per online jail inmate information.

Ferguson said officers were called to a fight outside a bar in downtown Spokane. They investigated and then arrested Pena and another person. Pena identified herself as a professional fighter at the scene, Ferguson said.

A spokesperson for Spokane County Jail said that Pena was released on $2,000 bail Sunday afternoon. The official time per online records was 2:20 p.m.

The arrest news first came to light via a poster on the Sherdog forums.

Pena, 26, did not respond to a request for comment Sunday evening. UFC senior vice president of public relations Dave Sholler told MMA Fighting that the organization is "aware of the situation" and "in the process of gathering more information."

The penalty for assault in Spokane, according to the city's municipal code, is a fine that does not exceed $5,000, imprisonment for no longer than 364 days, or both a fine and imprisonment.

Pena was the first female winner of The Ultimate Fighter reality show in 2013. She holds a record of 7-2, has three straight wins in the UFC and has etched her name among the top contenders in the women's bantamweight division. Pena, currently ranked No. 6 among UFC 135-pound women's contenders, is coming off a unanimous decision victory over Jessica Eye at UFC 192 in Houston.