Investigations by Saudi authorities have uncovered attempts to hide or destroy evidence in the food poisoning incident associated with the Hamburgini restaurant in Riyadh. The Oversight and Anti-corruption Authority (Nazaha) officials' findings indicate potential collusion by a few unscrupulous food establishment inspectors who prioritized personal gain over public health and safety.

The food poisoning at Hamburgini restaurant resulted in one fatality and 75 hospitalizations due to contaminated mayonnaise. Out of the 75 affected individuals, 69 were Saudi nationals, and the remaining six were expatriates. Laboratory analysis identified the presence of the Clostridium botulinum bacteria, the cause of botulism, in a sample of 'BON TUM' mayonnaise served at the restaurant. Nazaha has confirmed that the incident has been contained and resolved. It has also stated that measures of accountability will be taken against anyone found negligent in public safety protocols or involved in obstructing the investigation and concealing crucial information related to the cause of the poisoning.

Royal directives stipulate that all accountable officials, irrespective of their positions, will be held responsible. This includes individuals who neglected or delayed their duties, actions that might have contributed to the poisoning or hindered response efforts. Subsequently, a high-level committee has been established to ensure the enforcement of these directives. Relevant authorities, such as ministries, agencies, and committees, have received instructions to conduct a comprehensive investigation. They have produced detailed reports around the clock, outlining the circumstances, causes, and potential individuals responsible for the poisoning.

The epidemiological investigation promptly confirmed that the incident was confined to a single restaurant in Riyadh. Through meticulous laboratory testing by local and international foodborne illness specialists, the type and cause of the poisoning were identified. Conclusive results from these laboratories pinpointed a specific food additive as the source of the contamination, which was swiftly removed from markets and food establishments nationwide.