Police carried out dawn raids to arrested three men in connection with violence at an FA Cup match between Millwall and Wigan.
The men, aged 21, 22 and 27, were arrested at addresses in London by officers from Operation Arrowtip, which targets football-related crime.
So far 23 people have been arrested in relation to violence at the semi-final at London's Wembley Stadium on 13th April, during which Millwall fans attacked police and fought among themselves inside and outside the ground.
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Cloud and outbreaks of rain will ease away eastwards during the morning, clearing the east coast around midday with sunny spells developing.
Police and emergency services are attending the scene.
Rebel-held east remains at risk while the pumping station supplying the western part of the city is once again in operation.