Al-Qaeda 'claims' US man's death

Al-Qaeda in North Africa has claimed responsibility for the killing of an American aid worker shot dead in Mauritania, al-Jazeera TV reports.
The Arab satellite channel said it received an audio message in which the group said it had killed 39-year-old Christopher Leggett on Tuesday.
Al-Qaeda in the Islamic Maghreb said it had targeted Mr Leggett for trying to spread Christianity in the country.
Al-Jazeera said it could not verify the authenticity of the message.
"Two knights of the Islamic Maghreb succeeded Tuesday morning at 8 a.m. to kill the infidel American Christopher Leggett for his Christianising activities," the group was reported to have said.
Al-Qaeda in the Islamic Maghreb is most active in Algeria, where it grew out of the remnants of the country's Islamist insurgency.
The group has also been blamed for attacks in neighbouring countries such as Mali and Niger.