Four men of Indian origin, three of whom ran two IT staffing companies in the US, have been charged with committing H-1B visa fraud by bringing job-seekers in on false claims that they had secured positions with companies in the country.

The security credentials of IT services supplier Hewlett Packard Enterprise have taken a severe battering with the revelation that it served as the gateway for alleged Chinese hackers to gain access to about major technology firms.

The United States has told India it may place curbs on the number of H-1B visas which can be issued to people from countries that insist overseas firms must store data locally.