Police said they are investigating incidents involving Millwall supporters at today's FA Cup semi-final that left some fans bloodied and younger ones in tears.
A Scotland Yard spokesman said:
Ten people have been arrested following sporadic disorder among fans in the Millwall supporters' area at Wembley. Investigations into the circumstances of the incidents are continuing.
More top news
Outbreaks of rain across northwestern parts of the UK will move slowly southwards.
The credentials of tens of thousands of government officials, parliamentary staff and police officers are reportedly being traded online.
A Which? investigation showed that users of Virgin Media's Super Hub 2 router could be at risk of a hacking attack.