Ammonia gas leak incident

IBN Live has reported an ammonia gas leak at Paradeep where 3 workers were rendered unconscious.  The news item mentions that "Sources said some crew members inadvertently handled the gas tank of the ship carrying 13,000 metric tonnes (MT) of ammonia gas meant for the plant. The employees who came in contact with the gas fell unconscious. The unloading of gas through a pipeline to the plant had been completed by then". 
Read the news item in this link.