John Prescott is reported to have thrown a punch at a demonstrator in Rhyl.
A reporter says the British Deputy Prime Minister threw a punch during a scuffle when he arrived at the Little Theatre.
Mr Prescott was manhandled by demonstrators before being escorted into the theatre by police.
It's reported at least two eggs were thrown at Mr Prescott just after he got off the party's coach.
The British deputy Prime Minister was also heckled earlier in the day when he was confronted by an angry ex-shipworker during an election campaign visit to Merseyside.
Earlier today, Britain's Prime Minister Tony Blair was heckled by a woman lambasting him over the state of the NHS.
Sharon Storer laid in to Mr Blair as he visited the Queen Elizabeth Hospital in Edgbaston, Birmingham.
The Home Secretary Jack Straw was heckled as he addressed more than 1,000 police officers at their annual conference in Blackpool.
Officers shouted and jeered as he made his speech about policing and law and order.
Conservative leader William Hague didn't escape. He was heckled during a walkabout in Wolverhampton.