Bhutan police can raid homes of smokers in a search for contraband tobacco and are training a special tobacco sniffer dog in a crackdown to honour a promise to become the world's first smoke-free nation. Buddhist Bhutan, where smoking is considered bad for one's karma, banned the sale of tobacco in 2005, but with a thriving tobacco smuggling operation from neighbouring India, the ban failed to make much of an impact.

But legislation passed in the new year, granting police powers to enter homes, is set to stub out the habit, threatening five years in jail for shopkeepers selling tobacco and smokers who fail to provide customs receipts for imported cigarettes.

The Bhutan Narcotic Control Agency has started raids, with officials allowed to enter homes if someone is seen smoking or if officials have reason to believe there is illegal tobacco there.