Oil prices fell again on Tuesday by nearly 40 cents to $50.14 per barrel on the declining demand and swine flu.
US Natural Gas gained more than 2% on short covering ahead of the May expiry.
The stocks of crude in the US went up by 4.6 mn barrels, more than twice expected, reported American Petroleum Institute.
The Output of Natural Gas is expected to go down because of a record decline in the number of gas rigs to below 700. This may be balanced by a weak heating demand leading to a steady build up in inventories and mild weather forecast.