CHENNAI, June 24 -- The death toll in the ammonia gas leak at a private seafood processing and export facility in Tamil Nadu's Tiruvallur district increased to nine on Tuesday, the government said. The health department, in its release, said that all the deceased are women. Seven of them were from Odisha and two from Assam. The toxic industrial chemical leak occurred during routine industrial operations on June 21, at the facility located in the Kannigaipair/Manjungaranai area near Periyapalayam. "The exact cause of the incident is currently under investigation by the competent authorities," the government said. According to the health department officials, 80 people were affected by the incident, of these 69 are under treatment while 2 wer...