Islamist insurgents retreating from the ancient Saharan city of Timbuktu have set fire to a library containing thousands of priceless ancient manuscripts, some dating back to the 13th century, in what the town's mayor described as a "devastating blow" to world heritage.

Hallé Ousmani Cissé told the Guardian that al-Qaida-allied fighters on Saturday torched two buildings where the manuscripts were being kept. They also burned down the town hall and governor's office, and shot dead a man who was celebrating the arrival of the French military.

French troops and the Malian army reached the gates of Timbuktu on Saturday and secured the town's airport. But they appear to have got there too late to save the leather-bound manuscripts, which were a unique record of sub-Saharan Africa's medieval history....