At least six people were killed and several injured on Saturday when a fire broke out after an explosion at an oxygen plant in southeastern Bangladesh, officials said.The death toll could rise as a rescue operation was ongoing at the plant at Sitakunda, 40km (25 miles) from the south-eastern port city of Chittagong, they added.It was not immediately clear what caused the explosion, a fire service official said.“Six bodies were recovered from the site,” local government official Shahadat Hossain told Reuters, adding that the rescue operation was continuing.A huge bang was heard which shook an area with a radius of up to 2km, police official Nayhanul Bari said, quoting witnesses.A massive fire at a container depot in the area killed 50 people and injured nearly 200 in June last year..

This article first appeared/also appeared in theguardian.com