Girl, 13, stoned to death in Somalia

(CNN) - A 13-year-old girl accused of adultery was stoned to death last month in a soccer stadium in Somalia, witnesses told CNN.

The killing occurred October 27 after the girl, Aisha Ibrahim Duhulow, told officials of al-Shabab, a radical Islamic group that controls the port city of Kismayo 500 km (300 miles) south of Mogadishu, that she had been raped by three men, said Amnesty International, citing sources.

The human rights organization said 50 men participated in stoning the girl, who had been placed in a hole in the ground, as about 1,000 people watched.

"It was absolutely appalling to be there, the girl was screaming and begging for mercy as she was being dragged to her killing hole," said a Kismayo resident who did not want to be identified out of fear for his safety.

None of the men accused of rape were arrested, Amnesty International said.