gurugram, April 10 -- A wage protest at Gurugram's IMT Manesar industrial hub turned violent on Thursday, leaving at least 22 people injured - including eight police officers - and four factories ransacked after clashes broke out between workers and police. Police said stone-pelting forced them to act; workers said they were charged without warning. The unrest, building since Monday across multiple factories, erupted when, police officials said, workers at two adjacent plants in Sector 4 attempted to block the main road in defiance of prohibitory orders issued the previous day barring gatherings of five or more people carrying weapons. Assistant commissioner of police (Manesar) Virender Saini, who was among the injured, said police moved to clear the road when workers turned on them. "We tried to stop them from blocking the traffic when they turned violent and started stone pelting. Police retaliated, after which clashes took place," he said. Saini sustained multiple bruises and cuts; a constable suffered a grievous leg injury. One police motorcycle was set on fire and four other vehicles - including those belonging to the in-charges of two police stations - were wrecked. Workers who fled a police lathi-charge subsequently barged into at least four factories, damaging cars, glass walls and machinery....