Arsenal are facing UEFA probe following crowd trouble at Emirates Stadium during the Europa League clash with Koln, according to the Mirror.

The kick-off in the Europa League tie was delayed by an hour as a huge number of Koln fans forced its way into the home section of the stadium.

A total of 3000 tickets were allotted to the Bundesliga club, but around 20,000 fans turned up in London to see their side in Europe for the first time in 25 years.

The North London side eventually claimed a 3-1 win in their group-opener of the tournament.