A 17-year-old employee at Sesame Place in Bucks County was punched in the face and required surgery for his injury after a dispute with a park visitor over wearing a mask, police said Monday.

Shortly after 5 p.m. Sunday, the employee was working at Captain Cookie’s High C’s Adventure ride when he was attacked by a male patron who was accompanied by a female, said Detective Lt. Steve Forman of the Middletown Township Police Department.

The employee had encountered the pair earlier and had reminded them that they were required to wear masks while in the park. When the male suspect saw the employee again at the ride, he punched him, Forman said in a telephone interview.

The pair were chased by park security but were able to flee in a vehicle registered in New York. Middletown police were working with authorities in New York to identify the suspects, who were described as between ages 20 and 30, Forman said.

The employee was taken to St. Mary’s Medical Center in Middletown on Sunday and underwent surgery on Monday for his jaw injury. He also suffered a damaged tooth.

A Sesame Place spokesperson said in an emailed statement: “On Sunday, August 9, a guest assaulted and seriously injured one of our team members. We’ve been in close communication with the family of our injured team member, and are hopeful for a full and speedy recovery. The health and safety of our guests and team members is our top priority, and violence of any kind is unacceptable and not tolerated at our park. We are cooperating with local law enforcement on this ongoing investigation. Any further questions should be directed to them.”

There have been no other reported incidents involving masks at Sesame Place since it reopened late last month, Forman said.