Mumbai, May 8 -- : In a new development in the mysterious death of a family of four from Mumbai's Pydhonie area, police have seized samples of Ayurvedic medicine and rat poison from the victims' residence and sent them for Forensic Science Laboratory (FSL) analysis, an official said today.

Police also recovered two rat poison cakes and a rat-killing spray from the house.

According to investigators, the packets containing the rat poison cakes were found sealed, while the spray appeared to have been used.

Earlier, an FSL report revealed that all four members of the Dokadia family died due to rat poison. Traces of zinc phosphide were found in the bodies of the deceased and in watermelon samples collected during the investigation.

FSL offic...