"Hundreds of armed militants who came from other provinces of Yemen and from abroad started their training in the Salah al-Din camp in Aden," the source said on the condition of anonymity.
According to him, the exact number of the fighters is unknown. Approximately, there are about 1,500- 2,000 people who arrived in the city to join the terrorist organization.
Earlier, it was reported that over 500 ISIL militants had been transported from Syria to Yemen on planes that had arrived from Turkey.
"They were transferred from Syria to escape Russian airstrikes," Syrian Armed Forces spokesman Brig. Gen. Ali Maihub said, adding that the fighters were “met by officers from the Saudi-led coalition who took them out of the [Yemeni] airport in three groups.”
Yemen has been engulfed in a military conflict between the government and the armed Houthi political opposition faction for over a year. A Saudi-led coalition of countries has been conducting airstrikes against Houthi positions at the request of Yemen’s displaced President Abd Rabbuh Mansour Hadi since March.