At least six persons were killed and around 100 others complained of breathing problems when an ammonia gas tanker leaked early on Saturday near Ludhiana, police said. The leak occurred when the tanker got stuck under a flyover on the Doraha bypass along a canal, about 25 kms from Ludhiana, according to the police. Six persons died after inhaling the leaked gas. Doraha Police Station's SHO Rajnish Kumar Sood said the bodies have been shifted to a hospital in Ludhiana. Around 100 others complained...