Celtic could be set to be hammered by UEFA after letting off flares in the away end ahead of this evening's AIK clash.

Hoops fans packed into the Friends Arena to watch as Neil Lennon's men attempt to see out their Europa League tie.

Celts hold a 2-0 advantage from the first-leg but, in their excitement to take in the action, fans of the visiting side sparked red flares amongst themselves - a breach of UEFA rules.

One eyewitness from the crowd explained how stewards were forced to wade into the away fans to extinguish the flares with buckets of sand.

It comes a short time after Rangers were hit with a sanction after fans were caught singing sectarian songs.

They have been forced to close a section of Ibrox for this evening's Legia Warsaw match.