At least 9 Mexican police officers have been shot and killed in an ambush on their convoy in western Jalisco state

Recently, 5 women in Ciudad Juarez were killed when buses taking them home from work were ambushed by gunmen. In Mexico City, 6 youths were shot dead in what police say may have been a gang-related feud. Mexico is suffering a wave of violence, mostly linked to the drugs trade. The 20 officers in the convoy in Jalisco were on patrol when they were attacked by gunmen in at least 10 sport utility vehicles, said a police statement. Nine officers were killed, while a 10th is still missing. Separately, at least 5 people were injured in grenade attacks in a suburb of Guadelajara, the state capital of Jalisco. Two of those wounded were toddlers and a third was a 17-year-old girl. The killings in Mexico City may have been drug-related, said Miguel Angel Mancera of the attorney-general's office, but there had also been disputes between local car-jacking gangs. The Tepito district, just north of Mexico City's historic center, is a poor neighborhood with a high crime rate. The killings have raised concerns that the drug-related violence raging in the northern border states and some other regions of Mexico is coming to the capital. The latest killings in Ciudad Juarez, a border city at the heart of the drugs conflict, do not appear to be drug-related. Gunmen opened fire indiscriminately on 3 buses carrying female factory workers back from a shift at a plant making car parts. At least 14 others were wounded in the attack, with some in a critical condition. Some 28,000 people have died in drugs-related violence in Mexico since 2006. More than 7,000 people have died in the violence in 2010 - making it the bloodiest year since President Felipe Calderon dispatched some 50,000 troops to take on the drug cartels.