A defense official in Somalia says a roadside bomb in the country's semiautonomous northern region has killed two people, including an infantry division commander.

Somaliland defense minister Saleban Warsame Guled says two remote-controlled bombs were used in the attack that killed Osman Yusuf.

After the first blast, Yusuf went to the attack site to investigate. Guled says a second explosion then went off, killing Yusuf.

The attack comes only days after the powerful militant group al-Shabab, which is concentrated in southern Somalia, threatened to attack the northern region of Somaliland and other countries in the Horn of Africa, including Uganda and Kenya.