The man at the centre of cricket betting scam allegations concerning the Pakistan team has been released without charge on police bail.
Cricket agent Mazhar Majeed, 35, was arrested on Saturday on suspicion of conspiracy to defraud bookmakers.
The News of the World claimed it paid him for advance details of when three no balls would be played in the latest Lord's Test, which England won.
Police also questioned several Pakistan players over the alleged scam.
Mohammad Amir, Mohammad Asif and Pakistan's captain Salman Butt had their mobile phones taken away by detectives. The three players and their team-mate, wicket keeper Kamran Akmal, were all interviewed by police.
Their team manager, Yawar Saeed, said cricket was not "institutionally corrupt" in Pakistan and the claims were unproven.
The allegations relate to three no-balls delivered by Mr Amir and Mr Asif on Thursday and Friday. A no-ball occurs when a bowler oversteps the line behind which balls should be delivered.
Scotland Yard said Mr Majeed, 35, was bailed to appear before police at a future date.
Despite the allegations, the fourth and final Test went ahead at Lord's, with England winning the series 3-1.
'Tough day'
However, 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."
After the match, Pakistan's captain - Mr 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%."
When asked about the allegations against him personally, he said: "These are just allegations and anybody can stand out and say anything about you, doesn't make them true."
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.
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.
These sentiments were echoed by politician and former Pakistan cricket captain Imran Khan.
He told the BBC: "If the players are punished... if they are removed then the game goes on and it will be a warning to youngsters not to get involved in this activity."
A joint statement issued by the International Cricket Council (ICC), the England and Wales Cricket Board (ECB) and the Pakistan Cricket Board (PCB) stressed that no player nor team official had been arrested.
Mr Amir bowled two of the three no-balls which led to the investigation - one on Thursday and one on Friday.
The 18-year-old became the youngest bowler in Test history to take 50 wickets during day two of the second Test at Lord's.
His teammate, Mr Asif, bowled one of the three no-balls in question on Thursday, the first day of the Test at Lord's. The 27-year-old made his Test debut in 2005 and is currently ranked third in the ICC bowling rankings.
Mr Butt, who along with Mr Amir and Mr Asif had his phone taken by police, was appointed Pakistan's Test captain in July.
He made his debut back in 2003 but was in and out of the side for several years until nailing down a regular place in 2007.
Source: bbc.co.uk/
