Police are appealing for witnesses after a bottle was thrown onto the pitch during Sunday's Old Firm match at Ibrox.
It's understood that during half-time, between 12.45pm and 1pm, a glass bottle was launched from the Copland Road Stand onto the pitch. Broken glass was found scattered in front of the goalposts.
The second half was delayed after Joe Hart had to point out shards of broken glass laying in his penalty area.
