The tanker, which belongs to a shipbuildingcompany in the northern port city of Hai Phong, was carrying a crew of18 people and over 5,000 tonnes of oil when it vanished from radar 40minutes after leaving Singapore on October 2 for Quang Tri province incentral Vietnam.
A week later, the ship and its crew were released and arrived in Quang Tri on October 9.
The result of black-box testing is impending, said chief of thePolice Department for Investigation of Social Order-related Crimes, Maj.Gen Ho Sy Tien on October 23.
The department will work withInterpol and a Singapore-based centre for Southeast Asia piracyprevention to hunt down attackers, whose nationalities remain unknown.
Once sufficient evidence is collected, the police will take legal proceedings in accordance with Vietnamese law.
The Sunrise was the 12th such piracy case since April in SoutheastAsia where tankers have been hijacked and then released after thecargoes were taken off, according to the International Maritime Bureau.
Vietnam is now a member of the Southeast Asia and Asia conventions on countering piracy.-VNA