A VND1.5-trillion (US$70.3 million) pipe which provides clean water for around 70,000 families in the capital city have broken again, the 11th time in the past three years, news website VnExpress reported Tuesday.
The latest rupture of the 47-kilometer long pipe came only days after police expanded investigation into the case, arresting seven executives of the construction and management company Vinaconex Corporation.
Two senior managers had been arrested earlier.
Nguyen Anh Viet, director of Vinaconex's subsidiary VIWACO, was quoted as saying that water may need to be cut for a few hours to fix the latest rupture issue, promising that repair work will be completed Tuesday night at the earliest.
The pipeline, which starts at Da River Water Factory in the northern province of Hoa Binh, first broke in February 2012, and last on January 15 this year.
After it broke for the ninth time, Hanoi police stepped in, while local authorities ordered Vinaconex to build the second pipeline to reduce workload on the current one which supposedly supplies 300,000 cubic meters a day.
In its latest report to the city People's Committee, Vinaconex said the new pipe will go on stream next June.
It was estimated that nearly 1.3 million cubic meters of water had been lost in the first 10 ruptures.
The cost to repair the pipe, which was put into operation in 2008, has reached VND9.3 billion ($419,400) in total.
Vinaconex first blamed the ruptures on "the weak ground."
However, police's findings so far suggested that the pipe was of poor quality and not able to sustain the water flow pressure.