Roman Polanski began his house arrest on $4.5 million bail on Friday, rolling into the luxury resort of Gstaad in a police convoy to a warm welcome from his wife and children at his Alpine chalet.

Amid allegations of black money being stashed in Swiss banks, India and Switzerland have advanced their talks on amending the taxation treaty by a month to the second week of November.

The United States has formally asked Switzerland to extradite detained Oscar-winning director Roman Polanski over a three-decades-old child sex case, Swiss authorities said on Friday.

A surprise arrest at the Zurich airport, detention at the hands of Swiss authorities, and a high-profile extradition process that could take weeks or months.

Swiss police detained Oscar winning film director Roman Polanski on a US warrant over three-decade-old charges of unlawful sex with a 13-year-old girl, a film festival's organisers said on Sunday.

Faced with international pressure, Switzerland announced earlier this year it would ease banking secrecy rules and offer more assistance on matters involving tax offences.

For more than 60 years, the Swiss have nurtured banking secrecy to the extent that it has become an unshakeable part of Switzerland's image like chocolate, watches, cowbells and Heidi.

The bank, which has been struggling to recover after losing billions in the financial and economic crisis, said its losses for the first quarter reached about two billion francs (1.32 billion euros, 1.75 billion dollars).

Andy Roddick delivered the winning point in dominant style on Sunday as the United States wrapped up a 4-1 Davis Cup victory over Switzerland in their World Group first-round tie.

Andy Roddick has pulled the United States level with Switzerland in their Davis Cup World Group tie, after Stanislaus Wawrinka shrugged off the absence of Roger Federer to put the visitors ahead.

Switzerland is likely to come under further pressure from the United States over its prized system of banking secrecy after the election last week of Barack Obama, key sector players predicted.

In a crowded Swiss cafe nestled in the picturesque Alpine town of Interlaken, Indian film star Anushka Shetty tries to catch the attention of fellow actor Gopichand Tottempudi. He ignores her, she throws a tantrum, sending a coffee cup flying in front of a crowd of bystanders.

Switzerland's biggest bank UBS on Friday said it would axe another 2,000 jobs as it moved to shrink its investment bank which had been battered by the US subprime loan crisis.