Kathmandu, Dec. 24 -- Over the past year, Nepal's immigration authorities have dealt with a growing number of cases where foreign nationals entered the country for one declared purpose but engaged in entirely different-and often illegal-activities. These cases have ranged from religious teaching and business operations under the wrong visa category to organised fraud and unregistered commercial ventures.

In one instance, four Indonesian nationals arrived in Nepal on student visas and enrolled at Bishwa Bhasa Campus (language school) in Kathmandu. Investigations later found that they were not pursuing academic studies but were instead teaching the Quran at a private institution. They were detained and deported.

In another case, a French ...