See the photo here.
5 persons died and 156 got injured in the incident.
It appears that there are no warning signs or no height barriers to prevent overheight vehicles going under the flyover.
The tanker was carrying 22 T of anhydrous ammonia.
Police and fire brigade officials reached the spot to control the situation.
Some of the affected had breathlessness, eye irritation, choked voice, etc. Few had bleeding from mouth and nose.
A senior police official and others controlling the situation were also affected in the incident as per the reports.
Tanker was moved to a vacant plot.
Ammonia solubility in water is very high and is instantaneous at temperatures below atmospheric. Water was used to absorb leaking ammonia.
The odour was present for more than eight hours. The affected areas was about four kilometer radius around.
Dead animals/birds and vegetation/plants were seen.
Heavy rain later subsided ammonia in the environment by absorbing and washing.
A case was registered under Sec 304 of IPC (culpable homicide not amounting to murder) on the absconding driver.
http://www.ibtimes.co.in/ludhiana-ammonia-gas-leak-tanker-kills-6-over-100-affected-635709
http://www.ibtimes.co.in/ludhiana-ammonia-gas-leak-tanker-kills-6-over-100-affected-635709