Iranian training camps for Houthis were established in southern Syria for preparing the Shiite Yemeni fighters, diplomatic European sources said on Thursday.
The sources said the Yemeni fighters were receiving trainings through taking part in combats in Syria before returning to Yemen.
The trainings were conducted under the supervision of Iranian Revolutionary guards, as the single batch could group up to 100 militants.
The sources asserted that the Yemeni fighters were gathering in Iran or Beirut, and then moved to Syria.
At least 3,000 militants were subjected to trainings in these camps, they added.