Four members of a family in Pydhonie area of south Mumbai died last month due to rat poison, police officials said on Thursday.

Forensic tests found zinc phosphide in the Dokadia family's viscera and the watermelon they ate. The findings have shifted the Mumbai Police probe from suspected food poisoning to tracing how the toxin entered the food.

Forensic tests found zinc phosphide in the Dokadia family's viscera and the watermelon they ate. The findings have shifted the Mumbai Police probe from suspected food poisoning to tracing how the toxin entered the food.