Pakistani firefighters extinguish a blaze which gutted a historial building in Ziarat, 80 kilometres southeast of Quetta, on June 15, 2013.

Militants blew up a historic building in violence-plagued southwest Pakistan after shooting dead a guard in a predawn attack on June 15, officials said.

The country's founding father Mohammad Ali Jinnah spent his last days in the building, which was declared a national monument following his death, one year after Pakistan's independence in 1947.