Fourteen Tunisian oil workers kidnapped by armed men in western Libya were freed Sunday night after three days in captivity, the Tunisian consul in the country, Taoufik al-Guesmi, and the Foreign Ministry in Tunis said. Armed men seized the Tunisians from a bus on Thursday as they were heading to work at an oil refinery in Zawiya, just to the west of the Libyan capital Tripoli. Guesmi did not disclose the conditions for the release of the workers, whose abductors had demanded a man jailed in Tunisia be released from prison. But a security source in Zawiya confirmed the news of their release, saying the hostages had been freed in an operation carried out by the towns security forces. The forces "stormed the place where they were being held and were able to release them without fighting, no casualties," Thamer Mounir, head of the media section of the Zawiya security service, told AFP. Mounir was unable to say if any arrests had taken place. After their release, the Tunisians were taken to offices of the Zawiva security authorities, the Foreign Ministry in Tunis said in a statement. Earlier Sunday, in a video posted on social media, the kidnappers had demanded the release of a man jailed in Tunisia for drug trafficking. The video showed the abductees identifying themselves and naming their hometowns while sitting on mattresses. The last one then says that the people holding them want the release of Libyan Kamal al-Lafi al-Hijaoui, adding that he and the other abductees were "in good health". A Tunisian source said Hijaoui had been sentenced this month in Tunisia to 20 months in prison for drug trafficking.