India, April 2 -- Tech giants like Microsoft, Google and Amazon have issued a warning to their H1-B Visa staff amid increasing uncertainty around Trump government new immigrants policies. Notably, Indian tech workers represent the most significant number of H-1B visa holders in the United States.

According to Washington Post, major IT companies are already cautioning their employees about visas to avoid leaving the country or traveling abroad due to worries that they would not be permitted to return.

The H-1B program, which uses a lottery system to approve about 65,000 visas a year, plays crucial role in US IT industry that is highly dependent on foreign labor, particularly Indians. The majority of these permits are given to Indians, fo...