QUETTA –As many as seven people, including four security personnel, were killed and over two dozens wounded in a coach-tanker collision on the National Highway in tehsil Wadh, some 370 kilometers from here on Tuesday.According to the Levies’ sources, a passenger coach was heading towards Khuzdar from Karachi when it collided with a tanker coming from the opposite direction. As a result, 15 people, including four security personnel, were killed instantly and more than two dozens wounded. The dead and injured were shifted to Combined Military Hospital. The sources said those seriously injured had been shifted to Quetta.The deceased were identified as bus driver Bashir, tanker driver Muhammad Hayat, Muhammad Akram, Liaquat Ali, Hibadath Ali, Muhammad Zaheer and Noorullah.