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CLEVELAND — Three people have pleaded guilty in a March assault of Chuck E. Cheese’s employees that police say began with complaints over a malfunctioning photo machine during a child’s birthday party.

Authorities say Chakara Watts, Jahmeel Green Jr. and Jahmeel Green Sr. entered their pleas on Monday. It’s unclear when they’ll be sentenced.

Investigators say six employees in the Cleveland suburb of Parma were hurt in the March 6 attack. Two suffered serious injuries.

Watts and Green Jr. both pleaded guilty to misdemeanors. Green Sr. admitted to aggravated riot.

Two others will stand trial on charges of felony aggravated riot and felonious assault in the incident.

Watch a story from the time of the incident in the video player above.