European stock markets fell at the start of trading on Monday, but London's losses were capped by strong gains for energy giants on the back of soaring oil prices.
London's benchmark FTSE 100 index lost 0.1% to 7 358.96 points, as BP shares rallied 3.8% to 5.23 and Royal Dutch Shell jumped 3.3% to 23.56.
In the eurozone, Frankfurt's DAX 30 shares index lost 0.6% to 12 392.73 points at the open and the Paris CAC 40 retreated 0.5% to 5 626.92.
Around 09:00, Brent crude oil was up 8.8% to $65.50 per barrel and WTI soaring 8.0% to $59.28 per barrel.
Attacks on two Saudi facilities has slashed output in the world's top producer by half, fuelling fresh geopolitical fears as US President Donald Trump blamed Iran and raised the possibility of a military strike on the country.