World Bulletin / News Desk
"Three soldiers and a vigilante were killed in clashes between the two sides on Thursday," an eyewitness told.
He said more than 10 people were also injured in the violence.
Thursday's clashes broke out near the Aden airport on the background of a decision by Hadi to sack Special Forces chief Abdel-Hafez al-Saqqaf.
Saqqaf has rejected dismissal.
Clashes between pro-Hadi vigilantes and security forces have recently become commonplace in Aden.
Last month, Hadi fled to Aden from capital Sanaa, where he had been placed under house arrest by Yemen's powerful Shiite Houthi group.
Yemen has been in turmoil since 2011, when a popular uprising erupted that led to the resignation one year later of autocratic PresidentGüncelleme Tarihi: 19 Mart 2015, 10:53