Sushma Swaraj, India's foreign minister, briefed Prime Minister Narendra Modi on the incident on Friday, according to the online edition of the Times of India.
As of Friday afternoon, two of the four men had been released, according to a tweet posted by Swaraj.
Four Indians abducted in Libya - I am happy we have been able to secure the release of Lakshmikant and Vijay Kumar. Trying for other two.
— Sushma Swaraj (@SushmaSwaraj) July 31, 2015
Vikas Swarup, a foreign ministry spokesman, said that all four had been returning to India through Tripoli when they were detained at a checkpoint about 50km from Sirte on Thursday evening."We are in regular touch with their families and all efforts are being made to ensure their early release," Swarup was quoted by NDTV's website.
Indian media reported that the four were kidnapped by armed rebels linked to the Islamic State of Iraq and the Levant (ISIL).
More than a year ago, at least 39 Indian citizens were reportedly kidnapped in Iraq's Mosul. The incident was blamed on ISIL, but the group never issued a claim of responsibility.