"I have eight sources who say they are alive.. not oral messages but 'likhit sandesh' (written messages)," she said, adding that she has shared them with Prime Minister Narendra Modi, and her ministerial colleagues Arun Jaitley and Harsimrat Kaur Badal.
She also discounted the version of one of the men who escaped, Harjit Masih, who has claimed that the men were shot dead.
Sushma Swaraj said she treats the search for the men not just as a responsibility but a mission. She said she has spoken to the Middle East countries on the issue more than once.
"I will continue the search and not believe in what that person has said," she said, referring to Masih.
Giving a break-up of the Indians evacuated from different countries, Sushma Swaraj said that the government had brought back 1,000 students from Ukraine when the crisis unfolded, 7,000 Indians from Iraq when the Islamic State began running over swathes of the country and 4,500 Indians as well as foreign nationals from Yemen earlier this year.