Police spot checks are to be made on supporters' buses ahead of this weekend's Scottish Cup semi-final matches.

Aberdeen face Motherwell at Hampden on Saturday while Rangers meet Celtic on Sunday.

More than 50,000 fans are expected to attend both games.

Supporters' buses will be stopped on their way to the stadium while police dogs will also search for flares, fireworks and smoke bombs at the turnstiles.

Chief superintendent Brian McInulty said: "We have seen a trend for people bring flares or pyrotechnics to matches.

"These devices can be very dangerous and can endanger your own as well as other's safety.

"It is important for those attending to remember that to enter the stadium with any of these devices such as flares or smoke bombs is illegal.

"If you are found to be in possession of any of these types of prohibited items, you will be arrested."

He added: "Although the kick-off time for the second semi between Celtic and Rangers is slightly later than has been normal, this should not mean that those planning to attend should think they have more time to consume alcohol to excess.

"Put simply, if you are drunk and attempting to enter the stadium, you will not be permitted and you will miss the game."