An unidentified fighter jet has bombed a rebel-held town in Somalia, killing one person, while a blast in the capital, Mogadishu, has killed at least ten civilians.

Residents say the warplane struck the al-Shabab-controlled village of Yaqle on Tuesday. It is located in Somalia's Gedo region near the Kenya border.

Separately on Tuesday, a roadside bomb exploded in the Wadajir district of southern Mogadishu. Officials say the target of the blast was unclear.

Kenyan forces entered southern Somalia in October to hunt for al-Shabab militants, and since then they have conducted sporadic airstrikes on militant targets. Kenya has blamed the Islamist insurgents for a string of kidnappings of foreigners on Kenyan soil.

Somali forces backed by African Union troops forced al-Shabab out of the capital in recent months, but the the militants remain active in the area.

Earlier this week, witnesses reported seeing Ethiopian troops enter Somalia.

Somali Defense Minister Hussein Araba Issa said the Ethiopian troops will work alongside Somali government forces. However, the Ethiopian government has denied sending troops into Somalia.

Al-Shabab has been fighting since 2008 to topple Somalia's weak central government. The group is believed to have links to al-Qaida, and is considered a terrorist organization by the U.S. government.