File photo shows a US Predator terror drone.
At least eight people have been killed and more than 21 others wound in the latest attack by US terror drones in southern Somalia, Press TV reports.
The incident happened in Kismayo, a strategically important port city on Somalia's Indian Ocean coast where the largest checkpoint of al-Shabab fighters has been destroyed on Friday.
A senior al-Shabab official, Ibrahim Abu Yoonis, identified as Ibrahim Jurus has confirmed the number of casualties.
Earlier in the week, reports from Kismayo situated some 500 kilometers (310 miles) south of capital, Mogadishu, claimed that hundreds of people have fled to other cities, as African Union troops build more military bases near the port city to seize control of the area from al-Shabab fighters.
Meanwhile, the US military uses remote-controlled drones in Somalia for reconnaissance operations and targeted killings.
Washington has been carrying out assassination attacks using the unmanned aircraft in other countries including Afghanistan, Libya, Pakistan, and Yemen.
The United States claims the CIA-run strikes are aimed at militants. But witness reports and figures offered by local authorities indicate the attacks have led to massive civilian deaths.
The UN has condemned the US assassination drone strikes, saying they pose a challenge to international law.
The weak Western-backed transitional government in Mogadishu has been battling al-Shabab fighters for the past five years, and is propped up by a strong African Union force from Uganda, Burundi, and Djibouti.
Strategically located in the Horn of Africa, Somalia remains among the ones generating the highest number of refugees and internally-displaced persons in the world.