Objects have reportedly been thrown into the Celtic dugout during the match against Rangers.
Sky Sports reports missiles were launched into the technical area in the aftermath of Cyriel Dessers' disallowed goal.
Commentator Ian Crocker said: "Sadly, there are objects being thrown into the Celtic dugout."
Footage on the broadcast then showed Celtic assistant John Kennedy in discussions with a police officer over the incident.
It came after John Beaton's decision to rule out Dessers' strike - which would have equalled the scores - for a foul in the build-up by Tom Lawrence on Tomoki Iwata.
More to follow.
Comments & Moderation
Readers’ comments: You are personally liable for the content of any comments you upload to this website, so please act responsibly. We do not pre-moderate or monitor readers’ comments appearing on our websites, but we do post-moderate in response to complaints we receive or otherwise when a potential problem comes to our attention. You can make a complaint by using the ‘report this post’ link . We may then apply our discretion under the user terms to amend or delete comments.
Post moderation is undertaken full-time 9am-6pm on weekdays, and on a part-time basis outwith those hours.
Read the rules hereComments are closed on this article