Updated

Fort Collins police have launched an investigation after a video showed an officer throwing a woman face-first to the sidewalk after a scuffle in this university town.

Police earlier told the Coloradoan newspaper that officers were responding to a fight between two men near a bar when Colorado State University student Michaella Surat struck the officer after police detained her boyfriend. Police spokeswoman Kate Kimble said the officer used "standard arrest control" to control her.

A booking photo of Surat released by police did not show any visible injuries to her face.

She was arrested on suspicion of third-degree assault and obstructing a peace officer and released on bond. She could not be located for comment.

In a statement Sunday evening, police Chief John Hutto said the video shared on social media does not have the "context or content of the full event." He said the incident was captured by police body cameras but he said he would not release that footage until after the investigation is complete.

"I am committed to preserving a process that ensures a fair and impartial outcome. I am equally committed to preserving the rights of both Ms. Surat and the involved officers," he said.

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Information from: Fort Collins Coloradoan, http://www.coloradoan.com