Pressure was growing on FIFA last night to launch an investigation into fresh allegations that six executive committee members asked for bribes or favours including a knighthood in return for World Cup votes.

FIFA's already-tarnished reputation has received another battering after the claims made by former FA and England 2018 bid chairman Lord Triesman against four FIFA top brass.

Two more FIFA members, Issa Hayatou, from Cameroon, and Jacques Anouma, from the Ivory Coast, were alleged to have been paid $1.5m to vote for Qatar for the 2022 World Cup, according to claims highlighted by MPs at the culture, media and sport committee in the House of Commons.

In a morning of whistle-blowing at the inquiry, claims of "improper and unethical" behaviour by four other executive committee (ExCo) members were made by Triesman.

Two other FIFA members, Amos Adamu, from Nigeria, and Reynald Temarii, from Tahiti, were banned by the body's ethics committee last year.

The latest developments mean eight FIFA ExCo members - one third of the total of 24 - have either been alleged to have been or already found guilty of impropriety in relation to the 2018 and 2022 World Cup bids.

Tory MP Damian Collins said the claims against Hayatou and Anouma were contained in evidence provided by the Sunday Times - who had an undercover investigation into World Cup voting last year - and published by the committee.

Collins said: "The Sunday Times' submission, and this is to be published by us later, claims that 1.5m dollars was paid to FIFA executive committee members Issa Hayatou and Jacques Anouma who went on to vote for Qatar."

The submission claims Qatar specifically employed a fixer to arrange deals with African members for their votes.

Triesman gave evidence of "improper and unethical" behaviour by four other executive committee members.

He said FIFA vice-president Jack Warner asked for money - suggested to be £2.5m - to build an education centre in Trinidad with the cash to be channelled through him, and later £500,000 to buy Haiti World Cup TV rights for the earthquake-hit nation, also to go through Warner.

John Whittingdale, chairman of the committee, said he would now be writing to FIFA president Sepp Blatter to launch an investigation into the evidence "as a matter of urgency".