HANOI, June 29 (Xinhua) -- Four people were killed and three others injured in a fire that broke out at a waste recycling facility in northern Vietnam's Hung Yen province on Saturday afternoon, local media Tuoi Tre (Youth) reported.

The blaze erupted at around 2:00 p.m. at the facility located in Van Lam district.

According to witnesses, the fire was believed to have started in the recycling area before engulfing other sections of the facility.

The cause of the fire is under investigation.