Ahmedabad, Aug 9 - A 43-year-old NRI who arrived in Ahmedabad from the US last month succumbed to Influenza A (H1NI) early Sunday, becoming India's fourth swine flu victim, officials said. His wife has tested positive for the virus and is in critical condition.

Pravin Patel, who flew in with his wife from Atlanta July 31, died at the government civil hospital. He was on the ventilator and his condition deteriorated late Saturday night.

'Pravin Patel was brought with a very heavy higher respiratory tract infection to the civil hospital and was under ventilation between Aug 5 and Aug 7. He was taken off the ventilator for a few hours on Aug 8 as his condition improved. He was put back on ventilation Saturday night as his condition again started deteriorating. His wife is still in a critical condition but not under ventilation,' a senior resident of the government civil hospital said.