A Celtic fan was arrested for throwing a hamburger at a police horse before the Scottish club's Champions League fixture at Manchester City on Tuesday.
Greater Manchester Police said the incident was one of 14 arrests made in connection with the game.
There were also reports of fans setting off fireworks on Greater Manchester's tram network.
The match at the Etihad finished 1-1 with City progressing to the knock-out stages and Celtic going out of Europe.