The Manchester United Supporters Trust has expressed their anger over tickets allocations for next week's FA Cup fourth-round clash with Arsenal.

The Red Devils have only been given 5,000 tickets instead of the usual 9,000 given to away supporters, with Arsenal citing "safety reasons" for the decision.

"What makes the FA Cup special is the larger away allocations than you get in league games," a MUST spokesman said.

"For Arsenal to offer little over half the proper allocation is a joke. The game is just 10 days away and at present United are unable to sell tickets to their fans.

"Supporters need to make arrangements for a fixture which has already been shifted to an inconvenient Friday night kick-off time."

And United's counterparts in north London have stood by their stance.

"Set at 15 percent in rules. Creates great atmosphere and creates differentiation to PL (Premier League). So frustrating to see this under threat at Emirates for MUFC Cup tie," the Arsenal Supporters' Trust wrote on Twitter.