Police have arrested five men accused of dozens of murders, including two mass killings at drug treatment centers earlier this month in Ciudad Juarez on the northern Mexican border, AP reported. Police said the men are members of the Sinaloa cartel, a violent gang entrenched in a brutal turf war with a rival cartel for control of the drug trade. The men are accused of 45 different slayings in Ciudad Juarez, Mexico's most violent city.