House as one executive warned the South American country was currently "uninvestable". Bosses of the biggest US oil firms who attended the meeting acknowledged that Venezuela, sitting on vast energy reserves, represented an enticing opportunity. But they said significant changes would be needed to make the region an attractive investment. No major financial commitments were immediately forthcoming. Trump has said he will unleash the South American nation's oil after US forces seized its leader Nicolas Maduro in a 3 January raid on its capital.

"One of the things the United States gets out of this will be even lower energy prices," Trump said in Friday's meeting at the White House. But the oil bosses present expressed caution. Exxon's chief executive Darren Woods said: "We have had our assets seized there twice and so you can imagine to re-enter a third time would require some pretty significant changes from what we've historically seen and what is currently the state." "Today it's uninvestable." Venezuela has had a complicated relationship with international oil firms since oil was discovered in its territory more than 100 years ago. Chevron is the last remaining major American oil firm still operating in the country. A handful of companies from other countries, including Spain's Repsol and Italy's Eni, both of which were represented at the White House meeting, are also active. Trump said his administration would decide which firms would be allowed to operate. "You're dealing with us directly. You're not dealing with Venezuela at all. We don't want you to deal with Venezuela," he said. (BBC)