Suicide bombers target security forces in Quetta: Six policeman embraced martyrdomQUETTA: At least six policemen embraced martyrdom and 15 security personnel were wounded Tuesday when three suicide bombers blew themselves up in quick succession in the provincial capital, officials said."The first suicide bomber blew himself up outside a paramilitary frontier corps checkpost in the outskirts of Quetta city after he was spotted by the guards," Ghulam Ali Baloch, home secretary of Balochistan told AFP."Just in the next moments, another bomber who was covering the first attacker exchanged fire with the security forces and later blew himself up."Some eight paramilitary officials were wounded in this attack, he said.Around half an hour later a third bomber drove his motorcycle into a police truck on a road leading to the airport, Baloch said adding that six policemen embraced martyrdom as a result of the explosion.Moazam Jah Ansari, Quettas police chief, confirmed the attacks and said the bombing of the police truck was so powerful that the vehicle overturned.It was not clear whether the third bomber was wearing an explosive vest or if the bike was filled with explosives."Seven policemen were injured in this attack," he said, adding that the three blasts may have been coordinated.No group immediately claimed responsibility for the attacks.