US Secretary of State Hillary Clinton has said the death of top African al-Qaeda militant Fazul Abdullah Mohammed is a “significant blow” to the group.He and another militant were killed earlier this week in a shootout with police at a checkpoint in Somalia’s capital, Mogadishu, officials said.Mr Mohammed was the most wanted man in Africa, with a $5m bounty on his head.He was suspected of having played a key role in the 1998 US embassy bombings in East Africa, which killed 224 people.He was also accused of attacking Israeli targets on the Kenyan coast in 2002, and was recently believed to have been working with the Islamist militant group, al-Shabab, which controls much of southern Somalia.