Leyton Orient have drafted in extra police and heightened their security amid fears tomorrow's League One clash with Millwall could be marred by crowd trouble.

Despite there being little history of violence between the two clubs, police are taking no chances following reports that a section of so-called West Ham fans will try and infiltrate Brisbane Road in a bid to resume their ongoing battle with their Millwall rivals.

Tensions have grown since Lions and Hammers fans rioted in and around Upton Park last month, causing carnage and evoking memories of football's darker days.

Both West Ham and Millwall are expected to be charged by the Football Association today for failing to control their supporters at the Carling Cup match.

Nearly 3,000 visiting supporters are expected at Brisbane Road and with West Ham not playing until Monday, Orient stadium manager Chris Baker has warned that any troublemakers will be met with zero tolerance.

"We've met with Millwall and the police to discuss it all," said Baker. "Every year we hear about how West Ham fans are going to come and cause trouble. Obviously with the recent tension we are being more vigilant and there will be a hefty police presence."