Washington (Agencies): Former US President George W Bush has reportedly scraped a visit to Switzerland amid concerns that he could be arrested for allegedly authorising the torture of prisoners.

The former President was due to speak at a charity gala, making the keynote speech at Keren Hayesod's annual dinner in the city of Geneva on February 12, the Sky News reported online.

However, human rights groups in the country have been calling for the Swiss government to arrest Bush over allegations he had ordered the torture of suspected terrorists at Guantanamo Bay.

Court officials have said criminal complaints against Bush have been registered in Geneva, but Swiss officials said that he would enjoy diplomatic protection as a former head of state, the report said.

In media, Bush has admitted to ordering use of waterboarding, which simulated drowning, as an interrogation technique.

Waterboarding is considered a form of pain which is a crime under international law, and human rights experts say absolute ban is very clear. Some left-wing groups had also called for a protest on the day of his visit.