Mumbai investigators have confirmed zinc phosphide — a powerful rodent poison — claimed the lives of all four members of a household in India’s financial capital, yet the mechanism by which the toxin reached the family remains a stubborn mystery more than three months later.
Laboratory tests detected the lethal chemical in tissue samples from 44-year-old Abdullah Dokadia, his wife Nasreen, 35, and their daughters Ayesha, 16, and Zainab, 13, who all consumed watermelon in the predawn hours of April 26. The same rodenticide appeared in fruit remnants from their Pydhonie residence, but scientists found nothing on knives, plates, chicken biryani, pulao dishes, or rodent poison products taken from the dwelling.
Authorities in Mumbai are examining four scenarios: deliberate murder, murder-suicide, a suicide pact, or unintentional contamination. Detectives await Zainab’s autopsy report and digital forensics from the victims’ phones while exploring possible financial angles behind the tragedy.
The case — instantly labeled the “watermelon deaths” by media outlets nationwide — triggered consumer panic that devastated produce vendors. Watermelon prices crashed in Navi Mumbai by Rs 5 to Rs 7 per kilo as merchants absorbed massive economic damage from the publicity.
How the Poison Kills
Zinc phosphide is an inorganic substance combining phosphorus and zinc, readily available throughout India for killing rodents. When swallowed, stomach acid converts the compound into phosphine gas — a toxic vapor that enters the bloodstream, penetrates cell membranes, and cripples cellular energy production.
Victims develop symptoms between half an hour and 60 minutes after ingestion: vomiting, dizziness, breathing difficulties, and convulsions. Advanced poisoning causes liver and kidney breakdown, disorientation, and loss of consciousness. Forensic authorities say survival requires medical treatment within roughly 60 minutes of exposure; beyond that threshold, even intensive emergency care usually fails. Internal medicine physician Dr. Hemalata Arora noted gastric lavage works only in that brief time span.
Former FSL director Dr. Rukmani Krishnamurthy observed the poison typically comes as a powder, suggesting someone could have dusted it over pre-cut fruit. Toxicology experts Dr. Bhushan Rokade and Dr. Sanjay Surase provided their analysis, theorizing Zainab succumbed first due to her lower body mass and therefore decreased resistance to the chemical.
A Night That Turned Fatal
The family entertained relatives on the evening of April 25, serving biryani to guests who departed around 10:30 p.m. Between 1 and 1:30 a.m., the four ate watermelon — their final meal.
Severe symptoms hit rapidly: all four experienced vomiting and diarrhea. Dr. Zaid Qureshi, who lives on the fourth floor of the building, rushed to help and found the youngest daughter struggling to breathe.
“I noticed that the youngest of the four individuals was experiencing difficulty breathing. I administered CPR. However, as her condition did not improve, she was taken to a nearby hospital. She passed away,” Qureshi told BBC Marathi.
Paramedics rushed the other three to JJ Hospital in Mumbai. Zainab died at 10:15 a.m. on April 26. Nasreen and Ayesha perished shortly afterward, while Abdullah died at 10:30 p.m. the same day. Gastric lavage and intensive medical measures could not reverse the poisoning.
Forensic Testing Reveals the Killer
The cause of death puzzled investigators for 11 days. Mumbai’s Forensic Science Laboratory (FSL) conducted 54 tests on evidence seized from the flat, examining leftover watermelon pieces, utensils, plates, and additional food items. The State Food and Drug Administration analyzed samples for contamination.
On May 7, the FSL reported to Mumbai Police that zinc phosphide was detected in liver, kidney, spleen, stomach content, bile, and fat tissue samples from each victim — and crucially, in the watermelon itself. All other food tested negative.
Deputy Commissioner of Police Pravin Mundhe confirmed that authorities opened an accidental death case through the JJ Marg police station, where officers gathered statements from family members and neighbors. Autopsy results confirmed the entire family died from zinc phosphide toxicity.
Investigation Continues Amid Market Turmoil
Authorities say rodent infestations plagued the apartment complex, but no evidence surfaced that rat poison was stored in the Dokadia residence. That finding has prompted detectives to pursue every explanation — whether the contamination was accidental or someone deliberately poisoned the fruit.
Police arrested two fruit sellers who were using rodenticide on their goods, though no official connection to the Dokadia case has been made.
On May 19, Mumbai Police submitted additional salt samples from the home to the FSL for analysis. Investigators now believe the poison may have been blended with table salt and scattered over the sliced fruit, which would have produced only a strange salty flavor before the victims fell ill. More than 100 individuals have provided statements to police regarding the deaths, which remain classified as accidental.
Early June brought the completion of laboratory analysis, but forensic testing found no toxin on utensils, dishes, chicken biryani, pulao, or rodent control products taken from the apartment, leaving investigators without a definitive contamination route. The investigation persists, with no new findings made public since the June testing cycle.