BP Plc said on Tuesday it was capturing more oil from its ruptured Gulf of Mexico well while U.S. scientists tried to figure out just how much crude was still pouring out.

The London-based company’s share price closed down 5 percent in London after U.S. President Barack Obama said he wanted to know “whose ass to kick” over the massive spill.

The on-going disaster remains at the top of Obama’s crowded domestic agenda, a point underscored by his strong comments and Tuesday’s announcement that he will head back to the Gulf coast next week to inspect efforts to contain the spill.

Obama will visit Mississippi, Alabama and Florida during a two-day trip beginning on Monday, the White House said.