A man purporting to lead an African branch of al-Qaida claimed responsibility yesterday for the beheading of a Sudanese newspaper editor who was found dead last week. The man, in a statement distributed to Sudanese newspapers, called editor Mohamed Taha a "dog of dogs from the ruling party", and accused him of insulting the prophet Mohammad. The statement was signed by Abu Hafs al-Sudani, who said he was the leader of al-Qaida in Sudan and Africa. Taha, an ally of the government who was himself an Islamist, was reported kidnapped from outside his home in the capital Khartoum a week...