(CNN) — A teenage girl was raped at the same Keith Urban show where 20 people got so drunk they were hospitalized, police said.

The attack happened in front of a large crowd of other concertgoers on the lawn of the Xfinity Center, an outdoor amphitheater in Mansfield, Massachusetts, on Saturday night, a police statement said.

The rape ended when a woman in the crowd pushed the alleged attacker off the victim and he fled, police said.

Sean Murphy, 18, was arrested “a short time later” and charged with rape, police said.

“Officers conducting the investigation were assisted by patrons that had been concerned and took photos and video of the assault on their cellular phones,” the Mansfield Police statement said. “Those phones are being processed to recover the digital evidence of the assault.”

Source: www.cnn.com