Al-Qaeda militants targeted an army base in southern Yemen killing at least 19 soldiers, according to officials and tribal leaders.
The gunmen attacked the camp with rocket propelled grenades and automatic rifles around midnight.
The militants stormed Al-Mahfad base in Abyan province and remained inside for several hours before military reinforcements came, three security officials told AFP.
"The Qaeda gunmen took advantage of what happened (Thursday) in Aden and launched an assault on Al-Mahfad base and clashed with soldiers," a government security official said.
"At least 19 soldiers were killed and others wounded," he noted.
On Thursday, 49 people were killed in separate attacks by militants targeting security forces in Yemen's Aden.
The first attack was a suicide car bombing while the second attack was carried out by Houthis who said they launched a drone and a ballistic missile at a training camp west of Aden.
The attacks were denounced by Yemen, Europe and Saudi Arabia.