If he is given a prison sentence following a U.S. trial, he would return to England to complete the rest of his sentence there before flying back to be imprisoned in the United States.

CNN: Radical cleric can be sent to U.S.

Meanwhile, Rangers boss Walter Smith has paid tribute to the departing Strachan, who is thought to be on a three-man shortlist for the managerial vacancy at Sunderland and would be interested in a return to England's top-flight.

BBC: Strachan eyes McGhee as successor

Realistically, his best chance of a return to the England team would be for the first Test against South Africa on July 10.

BBC: Flintoff out of last two NZ Tests

Leiweke added that the former England skipper would not be required to return from Milan to Los Angeles before the World Cup in South Africa.

BBC: Beckham confirms Milan deal close

Police allowed the trio to leave Pakistan's current tour of England and return home, on the proviso they would return if required.

BBC: Pakistan's Butt, Amir and Asif to contest ICC charges