According to the People's Committee of Binh Khe Ward, at about 0:05 on July 6, 2025, Binh Khe Ward Police received a report from people about a yellow pickup truck sinking under the lake in the Ben Chau dam area in Phu Ninh area, Binh Khe Ward.
Ben Chau Dam is currently managed by Dong Trieu Irrigation One Member Co., Ltd., the lake bed is in a state of drying up water, only part of it has water, the area around the lake has been put up with a warning sign "Areas at risk of airports entering".
Immediately after receiving the information, the Party Committee and People's Committee of the ward focused on directing the functional forces of Binh Khe ward to coordinate with the victim's family to conduct the search.

Based on the statements of the people involved, it was determined that: At about 9:30 p.m. on July 5, 2025, Mr. Nguyen Nhu Hieu (born in 1993) and his wife, Vu Thi Thuy Linh (born in 1993), both residing in Mao Khe ward, Quang Ninh province, invited Mr. Vu Van Hieu (born in 1986) and his wife, Ngo Thi Quyen (born in 1994), both residing in Mao Khe ward, to drive a pickup truck to go out.
Mr. Nguyen Nhu Hieu drove the car, Ms. Vu Thi Thuy Linh sat in the passenger seat; Mr. Hieu and Ms. Quyen sat in the back seat.
When reaching the spiritual road of Yen Tu, Ngoa Van in Phu Ninh area, Binh Khe ward, Mr. Hieu drove a car down to the Ben Chau lake area.
When moving into a flooded area, the car was flooded into 1/2 of the vehicle. All 4 people moved out of the car to find a way to get to the shore. During the move because the direction was unknown at night, Mr. Hieu and Ms. Quyen went to the shore and informed everyone to come and search. Mr. Hieu and Ms. Linh then did not see him go to shore.

Immediately after receiving the information, the Party Committee and People's Committee of the ward directed the Ward Police to mobilize police, military, security forces at the grassroots level, neighborhoods and the masses, and at the same time reported to the Provincial Police to send functional forces to quickly conduct search, rescue and relief.
At 5:47 a.m. on July 6, 2025, the bodies of Mr. Nguyen Nhu Hieu and his wife, Ms. Vu Thi Thuy Linh, were found in the water at Ben Chau dam and taken to the Mao Khe Coal Medical Center.
The People's Committee of Binh Khe Ward visited and encouraged the family of the drowning couple; at the same time, directed the authorities to handle the case according to regulations.