SAHIWAL - Two armed men gunned down renowned surgeon Dr Samiullah Chaudhry here on Sunday and fled away. Police said that two armed motorcyclists stopped car of Dr Samiullah at GT Road  Bypass in Sahiwal while he was heading towards Pakpattan. The accused opened straight fire killing the renowned surgeon on the spot and sped away. Police initially declared the incident as target killing and after registering a case into the incident have started investigation.