Air India said it will operate two more flights to Tokyo Sunday and Monday with a Boeing Co. 747-400 jumbo aircraft to bring back passengers amid deepening worries over radiation leaks from a nuclear plant damaged by last Friday’s devastating earthquake and tidal waves in Japan.The national carrier has flown out more than 1,700 Indian nationals since the natural disasters struck Japan followed by the nuclear crisis, Kamaljeet Rattan, a spokesman for the airline, told Dow Jones Newswires.To cope with the increasing demand from passengers wanting to fly out of Tokyo, Air India has deployed the bigger Boeing 747-400 jet that can carry up to 423 passengers from Wednesday, the spokesman said. Prior to the crisis, it used a Boeing 777-300ER plane with a capacity of about 300 passengers on the same route four times a week.

The airline has also increased the frequency of the flight from New Delhi to Tokyo to a daily one from four per week. It is also continuing to operate three flights per week to Osaka.We will keep operating the Boeing 747-400 aircraft to Tokyo as long as there is demand,Rattan said.Air India’s plans to continue to extend the services of the bigger Boeing aircraft to Tokyo comes a day after the country’s ministry of external affairs advised all Indian nationals to avoid non-essential travel to Japan. The ministry also asked all Indian nationals from Tokyo and areas closer to the exclusion zone declared by the Japanese government to consider moving to safer areas as a precautio