Al-Shabab announced the killings on its Andalus radio station, saying they were carried out in a public square in Kuntuwarey town in Lower Shabelle region late last night.
Witnesses say the men were tied to poles and shot dead by masked gunmen after a self-proclaimed judge read out their verdict in front of a crowd at the execution ground.
Al-Shabab, al-Qaida's East African affiliate, has fought for years to impose a strict version of Islam in the Horn of Africa nation.
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