Craig McPherson, Rangers coach is being investigated by police over an alleged headbutt on Celtic Women boss, Fran Alonso.
The incident took place after Monday's Old Firm match as McPherson approached Alonso on the pitch at Broadwood Stadium.
Rangers are also investigating the incident, while the Scottish FA's compliance officer is set to look into the matter too, after receiving the referee's report.
A Celtic spokesperson added, "Clearly this is a hugely concerning incident, falling well below any acceptable standard.
"We understand the matter is now being investigated and it will be up to all relevant authorities to take any appropriate action."
Police Scotland's spokesperson said, "We have received a report regarding an incident at Broadwood Stadium on the evening of Monday, March 27, 2023. Enquiries to establish any criminality are at an early stage."