Srinagar, August 31 (IANS) After two days of relative peace, a teenager was killed in firing by security forces on Wednesday as more violent clashes erupted in the Kashmir Valley, officials and witnesses said. They said Danish Ahmed, 18, was killed after he sustained injuries in a battle between stone-pelting protesters and the security forces in north Kashmir's Baramulla district. A police spokesperson said an unruly mob attacked the security forces with stones at Nadihal village. The security forces opened fire as protesters refused to disperse after tear smoke shells and pellets were fired at them. Ahmed sustained critical injuries and was moved to a hospital for treatment where he succumbed, the spokesperson said.