An Obama administration official says BP has agreed under pressure to show a live feed of a procedure called a "top kill" designed to choke off the oil spill in the Gulf of Mexico.

The company plans to try to execute the tricky procedure as early as dawn Wednesday. It's the latest attempt to plug the devastating oil leak.

The "top kill" involves force-feeding heavy drilling mud and cement onto the leak.

BP started showing live feed of the leak itself after pressure from the Obama administration. But lawmakers had said they had learned that the "top kill" procedure would not be shown.

The administration official who confirmed that BP had relented spoke on condition of anonymity to disclose private discussions.