Two cops of Balochistan Constabulary were killed while two others injured in an ambush on Sona Khan check post located in Hazarganji area on late night between Wednesday and Thursday. Unidentified culprits opened fire on the check post, injuring the law enforcement agencys four personnel present there. They also fired a rocket on the check post. The injured were rushed to the BMC Hospital where two of them succumbed to their injuries. Meanwhile, Khuzdar police confirmed that culprits fired two rockets on the town; however, these could not damage Radio Transmission Tower and fell on the ground near it. Kalat police contended that on late night between Wednesday and Thursday, blast was heard. The official maintained that unidentified culprits fired rocket on a FC check post set up at a nearby hill and in retaliation, the Frontier Corps personnel opened fire, however, no loss of life or property was reported. In Barkhan, armed men fired four rockets on the town from nearby hill on Wednesday night. Two of the rockets fell on a cricket ground, injuring a youth Mir Muhammmad. After the untoward incidents, security has been put on high alert in all cities of the province, particularly provincial capital of Quetta.