Officials say a biofuel manufacturing plant has caught fire in southern India, sending a giant column of black smoke into the air and forcing around 150 workers to flee the facility.

Rajesh Shetty, an Indian navy officer, says dozens of navy firefighters have joined civil authorities to douse the fire, which started Tuesday night.

He said Wednesday that six tanks of biodiesel fuel that caught fire have burned out, but that six others were still burning at the Biomax Fuels Ltd. plant near Vishakhapatnam, a port city in Andhra Pradesh state.

Shetty said the fire was under control, but that it will take several hours for it to be extinguished.

Yuva Raj, a local administrator, said no injuries have been reported. The cause of the fire was not immediately known.