Organized-crime violence left at least 22 people, including three police officers, dead in Mexico overnight, the authorities said Friday according to dpa. In the central state of Guanajuato, four people were found dead in a van at around 6 am, while two others were found murdered at a different site in the state. Such gruesome findings are commonly linked to vendettas in Mexico's bloody drug war, which has claimed more than 9,000 lives since January 2008. The authorities in the state of Hidalgo, also in central Mexico, said three police officers and nine alleged criminals died in clashes that took place late Thursday and early Friday. In the town of Badiraguato, in the state of Sinaloa, four suspects died in a clash with soldiers. Early Friday, alleged members of the drug gangs attacked a five- vehicle federal police convoy on a highway in the western state of Michoacan. The attack left one person injured.