Allegations of match-fixing swirled around the Pakistani cricket team on Sunday as it fell to host England by a large margin of an innings and 225 runs.
British police have arrested London-based sports agent Mazhar Majeed on suspicion of conspiracy to defraud bookmakers.
The arrest came after the British newspaper, News of the World, reported that it had filmed its reporters posing as representatives of a gambling cartel paying Majeed to fix a match.
The paper said it gave him $230,000 for arranging to have blatant no-balls bowled at specific times during play between England and Pakistan. Records show that occurred when two bowlers, Mohammad Amir and Mohammad Asif, delivered three deliberate no-balls against England on Thursday and Friday.
Amir, Asif and team captain Salman Butt were among the Pakistani players questioned by police late Saturday. The players refused to answer questions from reporters.
The fourth day of the match went ahead Sunday and England's win gave it the four-test series, 3-1.
Majeed and his brother Azhar are agents who represent a number of Pakistani players. Cricinfo.com reports that Pakistani players were warned ahead of the England tour not to meet the Azhars because of their suspicious activities.
Members of the International Cricket Council's Anti-Corruption Union left their headquarters in Dubai to travel to London to look into the allegations.
Cricket is the most popular sport in South Asia but allegations of match-fixing have surrounded the sport for years.
Some information for this report was provided by AP, AFP.