Pakistan's team manager Yawar Saeed: "No allegations are true til they are proved"

Three Pakistan cricket players have been questioned by police over claims they were involved in a betting scam, the team manager has said.

Yawar Saeed said cricket was not "institutionally corrupt" in Pakistan, and the claims were unproven.

The News of the World claims it paid a middleman for details of three no-balls later bowled by Pakistan as predicted.

Despite the claims about the ongoing Test, the match went ahead at Lord's, with England winning the series.

Scotland Yard said a 35-year-old man was being held on suspicion of conspiracy to defraud bookmakers.

The allegations relate to three no-balls delivered by Mohammad Amir and Mohammad Asif on Thursday and Friday. A no-ball occurs when a bowler oversteps the line behind which balls should be delivered.

After the match, Pakistan's captain Salman Butt told a news conference he and his team-mates had "given our best".

"I would say that everybody in this team has given 100%."

Mr Saeed said Mr Amir, Mr Asif and Mr Butt had all had their mobile phones taken away by detectives.

The police inquiries come after the News of the World claimed that in exchange for £150,000, a middleman gave it details of three no-balls which players later bowled at the predicted times.

The paper claims that Pakistani players were secretly paid to deliberately bowl the no-balls so gambling syndicates could bet on them and make money.

Life bans threat

Pakistan's Prime Minister Yousef Raza Gilani said the allegations made his country "bow its head in shame".

He has asked his government's Ministry of Sport to conduct an inquiry.

Pakistan's Sports Minister Ijaz Jakhrani said any players found guilty would face life bans.

"We will take strict action, but first we will have to look at the inquiry report [from the British police] and once it is out and implicates someone then we will give exemplary punishment," he said.

If any wrongdoing was proven, he said "all the players involved must forget to play for Pakistan in the future".

England's victory by an innings and 225 runs on Sunday gave them a 3-1 series win.

England captain Andrew Strauss said the allegations had "removed the gloss" from his side's victory.

"The mood was rather sombre. Cricket was in the headlines for the worst of reasons," he added.

"I can't really comment on the specific allegations, but clearly it has been a tough day."

The forthcoming one-day internationals and Twenty20 matches against England would continue as normal, he said.