A second incident of chlorine leak was reported from the Mumbai Port Trust (MbPT) warehouse at Sewri on Thursday.
Officials said Thursday’s gas leak was not as serious as the one reported the day earlier.
Eight people, including seven MbPT firemen, were affected by Thursday’s leak. This takes the total number of people hospitalised after the two incidents to 131.
Vinay Kajla, commandant of the Central Industrial Security Force (CISF), said the incident occurred at around 11 am, when five corroded chlorine cylinders were being neutralised. The chlorine in these cylinders was treated with caustic soda. During the process, the level of caustic soda in one cylinder went down.
"This generated fumes," Kajla said.
Officials the wind acted as a catalyst and spread the chlorine fumes.
All the staff of the National Disaster Response Force (NDRF), MbPT, the CISF and the police left the spot for some time as a precautionary measure. Work of neutralising the gas in the cylinders had to be suspended for 45 minutes.
An eyewitness said the fumes were so dense that he could not see beyond eight feet.
Shahbuddin Ali Ahmed, assistant commandant of NDRF, however, said "Everything is under control. There was no major leak."
Officials said one of the 105 cylinders at the warehouse leaked on Wednesday. Three other cylinders containing chlorine are being neutralised.
"The rest will be checked later because they are empty," Ahmed said.