BBC news with Marian Marshall.

The oil company BP has revealed that the cost of tackling the oil spill from a broken well in the Gulf of Mexico has risen dramatically. It now stands at $450m, but it is still rising fast. Jannat Jalil reports.

The oil giant says its attempts to contain the spill are now costing around $33m a day. That's five times more than a figure that was initially calculated. But despite the huge expense it’s incurring, BP has yet to make much progress in stemming the flow of oil. Nearly 13,000 people and more than 500 boats are being deployed to try to skim and direct the oil.