No traces of explosives were found in the motorbike explosion that killed a pregnant woman and critically injured her daughter in northern Vietnam last week, a news website quoted a local official as saying on Tuesday.
With the latest finding, it can be concluded that the accident wasn't a murder related to personal conflicts, as initially suspected, the unnamed official said on Giao Duc Vietnam (Vietnam's Education) the news website of Vietnamese universities' association.
According to the official from the Ministry of Public Security's forensic science institute, initial inspections also identified that the explosion started at the bike's battery adjacent to the fuel tank.
Inspections are still underway to identify the cause, he added.
In the meantime, the family of 29-year-old Nguyen Thi Quynh, who was killed in the accident, on Monday sent letters to provincial agencies and Honda Vietnam Co. Ltd., which produced the Super Dream motorbike. The family asked the company and the agencies to clarify the cause of the explosion.
A report on Vietnamnet on Tuesday said the bike was bought at Honda Viet Long, the manufacturer's agency, in Bac Ninh town and was still eligible for a service guarantee when the accident occurred.
By then, the bike had accumulated some 4,000 kilometers and had maintenance performed two times with no abnormal signs detected, according to the newswire.
Honda Vietnam has yet to comment on the accident, the newswire said.
On December 1, Quynh, who was one-month pregnant, drove the motorbike to take her daughter, four-year-old Nguyen Khanh Van, to school. The bike exploded right after she left home, and flung them off.
Quynh died due to multiple injuries, while her child had one of her legs amputated and is being treated at Hanoi-based Viet Duc hospital.