A major incident has been declared in St Leonards-on-Sea following the discovery of explosive chemicals inside a residential property on the A259 Marina, prompting a large-scale emergency response and the evacuation of nearby residents.

The incident began on Thursday, 20 March, when Sussex Police were called to the address after reports of suspected hazardous substances. As the situation escalated, the Explosive Ordnance Disposal (EOD) team was deployed to assess the threat.

Following a detailed assessment, the EOD confirmed that the chemicals posed an immediate risk to life, prompting authorities to establish a 100-metre safety cordon. The cordon stretches from Caves Road to Sussex Road, and includes some properties on West Hill Road.

Residents Urged to Evacuate Immediately

Police officers conducted door-to-door visits within the cordon zone, urging residents to evacuate as a precaution.

Officers have attended all properties within this area and spoken with residents, and we continue to urge those who remain within the defined cordon to leave to ensure their own safety,” a Sussex Police spokesperson confirmed.

Authorities have not yet confirmed the exact nature or origin of the chemicals, but the risk assessment was serious enough to warrant the activation of multi-agency emergency protocols.

Emergency services, including police, fire, ambulance, and specialist hazardous material teams, remain on scene as the investigation and response operation continue.

Ongoing Investigation and Public Safety

Police have reassured the public that every effort is being made to ensure community safety, and have urged residents to comply with evacuation instructions.

Local authorities are working to provide temporary accommodation and support services for those displaced by the incident.

Further updates are expected as forensic teams and chemical specialists work to determine the composition and intent behind the chemicals discovered.

Anyone with concerns or relevant information is encouraged to contact Sussex Police via 101, or in an emergency, dial 999.