
The three were captured near the central town of Elbur late on Sunday, senior Somali intelligence officer Mohamed Hasan said.
They included top commander Ali Yusuf, also known as Ali Ganey. He is thought to be responsible for the killings of civilians and attacks against Somali and AU troops in the area, Somali military commander Mohamed Kahiye said.
Al-Shabaab issued no comment.
The AU has more than 22 000 troops in Somalia to help the government battle al-Shabaab, which has campaigned for nearly a decade for a state governed under the strictest interpretation of Islamic law.


