The attack targeted a site manned by the separatists, who aspire to create an independent South Yemen such as the state that existed until 1990, the military sources said.
Iran-backed Huthi rebels on Sunday killed 10 Yemen army soldiers from a southern separatist faction in a "surprise attack" after more than a year of relative calm, military sources said.
Saudi Arabia has approved a $12 billion grant to Yemen's internationally recognised government, two officials told AFP on Tuesday, the latest attempt to prop up the war-scarred country's flagging economy