The first batch of mercenaries from the private US military firm DynCorp has arrived in the Yemeni city of Aden to replace paid militants from another American company.

Under a USD-3-billion contract between the United Arab Emirates (UAE) and DynCorp, mercenaries from the company are to be deployed to Yemen, where UAE forces are fighting against the Yemeni army and Popular Committees on Saudi orders, Khabar News Agency quoted an official with Yemeni Defense Ministry as saying.

The official, who spoke on condition of anonymity, said the first group of the mercenaries recently arrived in the port city of Aden to replace those of Blackwater, a notorious American group now renamed Academi.

He added that the new militants included special naval forces, who entered the port of Ras Omran southwest of Aden.

DynCorp is a rival of Blackwater, which hires mercenaries and sends them to fight in foreign countries on paid missions.

Blackwater had decided to withdraw from Bab-el-Mandeb region after the Yemeni forces inflicted heavy losses on them. The UAE was forced to bring in the new mercenaries from DynCorp for the same reason.

Yemen has been under military attacks by Saudi Arabia since late March last year. At least 8,400 people have been killed so far in the aggression and 16,015 others sustained injuries. The strikes have also taken a heavy toll on the impoverished country’s facilities and infrastructure, destroying many hospitals, schools, and factories.