The death toll from grenade attacks on an independence day celebration in central Mexico rose to eight on Saturday when a 13-year-old died in a hospital after fighting for his life for five days, Reuters reported. Michoacan state Gov. Leonel Godoy told local radio of the latest death from injuries sustained in Monday's attack in the colonial city of Morelia, capital of the drug gang-infested state of Michoacan. Mexican authorities have blamed drug gangs for the attacks, but no group has come forward to claim responsibility.