2007 Tonlé Sap dragon boat accident
On 23 November 2007, a 22-member Singapore national dragon boat team capsized after colliding with a pontoon in Tonlé Sap, Cambodia, leading to the deaths of five Singaporean dragon boat paddlers after they were sucked under the pontoon by strong water currents. They were participating in Bon Om Touk, an annual Cambodian festival.
Source: Wikipedia — 2007 Tonlé Sap dragon boat accident (CC BY-SA 4.0)