Two police officers were recovering on Sunday after being injured during scuffles involving soccer fans in Cardiff city centre on the eve of the Charity Shield soccer match.

One supporter was taken to hospital on Sunday afternoon, just minutes before the kick-off, after being slashed across the back in an incident near the Millennium Stadium.

Officers said he was not believed to have been seriously injured, and no-one had been charged in connection with the isolated incident.

Assaults

South Wales Police said they dealt with several disturbances on Saturday night which were believed to have involved Cardiff City and Manchester United fans.

A total of 15 people - the majority from Cardiff and other areas of south Wales - were arrested during the evening.

Two were arrested for assault, three for drug-related offences and 10 for public order offences.

Officers have said the outbursts may have been organised by fans claiming to support Cardiff, who won their opening division two match 1-0 against Wycombe at Ninian Park earlier on Saturday.

One police constable was was taken to hospital with a broken arm, and a dog handler was assaulted and suffered cuts and bruises.

The first disturbance broke out in St Mary's Street at its junction with Wood Street at around 2000BST, and was followed by another near the Poet's Corner pub on Clare Road at around 2220BST.

Police have said they are planning further arrests in connection with the incidents, and are appealing for witnesses.

Meanwhile, as fans converge on Cardiff for the Charity Shield, it emerged that the Football Association is under investigation by the Charity Commission.

The FA is under investigation by the Charity Commission who say the Association has not informed those buying tickets what proportion of the cost is going to charity.

The Commission says the FA is required by law to inform those buying tickets what proportion of the cost is going to charity - but it has not complied with the requirement.

The FA has responded by saying that all non-costs generated from the fixture are donated to charity - and it has placed an article in the match programme explaining how the money will be distributed.

The Charity Shield has become the first club match in British football to be played under the complete cover of a roof.

An inspection took place at 0900 BST on Sunday, when it was decided that the retractable roof should be kept shut for the Premiership curtain-raiser.

Football Association spokesman Adrian Bevington said: "There has been a lot of rain in Cardiff in the past week and there was also continual rain overnight and into the morning.

"Talks have therefore taken place between the Football Association, the stadium officials, the referee and representatives of both clubs.

"It was agreed that the roof would remain shut in the build-up to the game and during the match itself to protect the pitch."

Although Wales have previously played an international fixture under the cover of the roof in the stadium, this will be the first club match in Britain to take place under the same conditions.