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
David Cameron will try to convince MPs that Britain should be striking so-called Islamic State targets in Syria on Thursday.
Prince Harry has paid tribute to his mother, Princess Diana, and his nanny by naming buildings at a new African charity centre after them.
Strike action by doctors does not create a greater risk of patients dying, a new study has found.