London police found no hazardous substances in Kensington Gardens after a pro-Iran group claimed to have launched a drone attack [1].
The incident highlights the security vulnerabilities of diplomatic missions to unmanned aerial vehicles and the potential for disinformation to trigger large-scale urban security responses.
On April 17, 2026 [2], the Metropolitan Police Counter-Terrorism unit secured the area adjacent to the Israeli embassy on Kensington Palace Gardens [1]. The operation began after a pro-Iran group claimed responsibility for a drone attack intended to deliver dangerous substances to the embassy [1].
During the search of the gardens, officers discovered two [3] jars containing powder. These items were collected and examined by specialists to determine if they posed a threat to public safety, or the embassy staff [3].
Police later declared the items non-hazardous [3]. Officials said no dangerous substances were detected during the analysis of the powder [3].
Video footage had emerged appearing to show drones flying near the embassy, which coincided with the claims made by the pro-Iran group [1]. Despite the claims and the visual evidence of drone activity, the Metropolitan Police said that nothing suspicious was found during the final sweep of the area [1].
Kensington Gardens remained closed to the public while the Counter-Terrorism unit conducted its investigation [1]. The area was reopened once the materials were cleared as safe [3].
“Police found no hazardous substances in Kensington Gardens”
This event underscores a growing trend of 'hybrid' threats where physical actions—such as deploying drones—are paired with psychological operations to create panic. By claiming a chemical or biological attack via drones, the group forced a high-profile security mobilization in central London, achieving a disruptive effect regardless of whether the substances were actually dangerous.
