New Delhi, Aug. 13 -- The United States has revoked more than 600 visas from foreign nationals in the past month as part of a Trump administration crackdown on so-called "birth tourism", Secretary of State Marco Rubio said on Wednesday.

The visa cancellations followed the creation of a Birth Tourism Prevention Task Force by the State Department to identify people allegedly abusing the US visa system, dismantle networks facilitating birth tourism and prevent what the administration describes as the exploitation of US citizenship laws.

"In just one month, the Birth Tourism Prevention Task Force has taken action to revoke more than 600 visas from foreign nationals across the globe and will continue to safeguard our nation from this abuse,"...