Borussia Monchengladbach could face a fine from UEFA after German fans let off flares inside Celtic Park. 

Supporters let off flares after Lars Stindl brought the side up 1-0 against the Hoops during the Champions League clash. 

UEFA have clamped down on pyrotechnic use in recent years with clubs and fans being fined and banned. 

A video taken by fans within the German stands shows the supporters chanting and waving flags as flares are set off. 

Celtic were fined €13,000 for fans using flares during the Europa League clash with Fenerbahce last season.

The club also banned two fans after the incident. 

Celtic Football Club has been fined eight times in the last five years by UEFA over fan behaviour.