Karnal (PTI): Three labourers were killed and another fell ill after some poisonous gas leaked from the Chimney of an iron foundry on Gongripur road here on Friday, police sources said. The victims, who died on the spot, were identified as Akbar Ali (35), a resident of Dadupur Roran village, Satish Kumar (27), a resident of Pingli village and Jasmer (25), a resident of Narukheri village. The fourth labourer…