BAMAKO, Mali -- An al-Qaida-linked Islamist militant group in control of northern Mali stoned to death a couple accused of engaging in extramarital affairs, the group's spokesman said. The couple were publicly executed in the remote town of Aguelhok, near the vast West African nation's northern border with Algeria, on Sunday, a spokesman for the Ansar Dine group told Reuters. "These two people were married and had extra-conjugal relations. Our men on the ground in Aguelhok applied shariah (Islamic law)," said Sanda Ould Bounama, reached by telephone on Monday.