At least five people are killed in the Mexican state of Michoacan after gunmen launch a grenade attacks on federal police.<br/> <br />Mexican authorities say police responded with gunfire killing five gang members and injuring five officers.<br/> <br />Gunmen littered streets with burnt-out vehicles as gang members opened fire on police. Authorities have not confirmed if any police were killed.<br/> <br />They also attacked a hospital<br/> <br />Drug violence in Mexico has killed more than 55,000 people since December 2006.
