A doctor tends to a man, who was injured during clashes with riot police officers, at a local hospital in San Bartolo Ameyalco, outside Mexico City May 21, 2014. Residents are protesting the installation of pipes to draw water from a well and deliver it to other surrounding areas of San Bartolo, complaining the construction will mean water shortages for the town. REUTERS/Henry Romero (MEXICO - Tags: HEALTH POLITICS CIVIL UNREST)