Celtic have been fined by UEFA following the behaviour of both their players and fans during last month's Europa League clash with Inter Milan.

The Scottish club have been ordered to pay €8,000 after collecting five or more cautions during the 1-0 defeat to Inter in the round-of-32 second leg at the San Siro on Feb. 26.

They were also hit with a further €5,000 punishment after travelling supporters set off flares during the game, which saw Celtic crash out after a 4-3 aggregate loss.

Inter have been fined €5,000 after UEFA's Control, Ethics and Disciplinary Body also found them guilty of breaching rules on flares.

Confirmation of Celtic's firework charge last month came just days after the club had been fined 10,000 euros for a similar offence following December's Europa League group game against Dinamo Zagreb in Croatia.

Celtic had appealed for fans to behave at the San Siro but pyrotechnics were evident in the visiting section.

Celtic were not pleased with referee Ivan Kruzliak's display at the San Siro. Jamie McDonald/Getty Images

It is the seventh time in a little over three years that the club have faced UEFA punishment because of incidents involving their fans.

But Ronny Deila's players have also got the club into trouble after being found guilty of ''improper conduct'' after collecting five yellow cards and a red.

Virgil van Dijk was sent off following two bookable offences in the first half, while Craig Gordon, Adam Matthews, Emilio Izaguirre, Nir Bitton and Kris Commons were also booked.

Deila criticised referee Ivan Kruzliak after the game for his decision to send off his defender, while captain Scott Brown felt the Slovakian had been too harsh throughout.

Brown said at the time: ''Football is a man's game. There's always going to be tackles that are a wee bit late due to the pace of the game. These things happen but every single tackle shouldn't be a yellow card.''