The Mangaluru Police Commissioner, N Shashi Kumar, said that one labour collapsed while working in the fish waste storage tank in the factory on Sunday evening. Following this, seven other workers in the factory went to help him.

Two of those who went to rescue the labour also died during the rescue efforts. Two others died in the hospital on Monday morning. Three other workers, who are admitted to the hospital, are in the intensive care unit, he said. Bajpe Police station, which comes under the Mangaluru Police Commissionerate, has registered a case in this matter. Police have taken four people into custody for further investigation.