Severe pollution in southern Vietnam has caused water in a river in the Mekong Delta to turn black, killing fish and other marine life.

Residents living near the Cai Lon River in Hau Giang Province claim that a sugar factory located by the river has been discharging untreated effluent, VN Express reported.

Water in the river has turned black as a result and is also spreading foul smell.

Local authorities said they have taken samples of the polluted water to determine the cause and will take action accordingly.

Long My Town resident Pham Thi Thuy Linh, 35, said the water has been pitch black for 10 days and is only getting worse. Almost all of the fish, shrimp and frogs being farmed by nearby households had been killed by the polluted water,Human-powered helicopter smashes world record with 50-second pedal-driven flight



Pedal-powered craft smashes team's previous record of 11 seconds

Record-breaking flight to be validated by National Aeronautic Association

Longest flight by man-powered helicopter

A helicopter powered by a student pedalling on a lightweight bicycle-style frame has stayed airborne for 50 seconds - smashing the team's previous record of just 11 seconds.



The record but the team posted a video online showing the craft wobbling into the air under pedal power, piloted by University of Maryland engineering student Kyle Gluesenkamp.



The students hope to win a $250,000 prize for human-powered flight - but the helicopter, Gamera II, has to stay in the air for a further 10 seconds to meet the standards for the American Helicopter Society Prize.



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The students hope to win a