DHAKA, Dec. 13, 2014 - Photo taken on Dec. 9, 2014 shows the sinking site on the Shela River in Bangladesh. A 50-km oil slick coated the Shela River flowing through the Bangladeshi part of the world's largest mangrove forest on Thursday after a fuel-laden barge sank two days ago following collision with a heavy tanker. Officials said the authorities have already been working to remove the layer of oil that seeped in the world's largest mangrove forest -- Sundarbans.
Photo taken on Dec. 9, 2014 shows the oil slick on the Shela River in Bangladesh.
Local people work to remove the layer of oil on the mangrove forest in the Shela River
Part of oil covered mangrove forest is seen in the Shela River