The pan-European STOXX 600 index ended a volatile session down 0.8% to a more than one-week low of 621.24

European ​stocks dropped on Monday as escalating tensions in the Middle East dampened hopes for a ‌near-term resolution to the Iran war, while investors also digested dealmaking headlines involving Britain’s easyJet.

The pan-European STOXX 600 index ended a volatile session down 0.8% to a more than one-week low of 621.24.

The benchmark opened weaker after Iran and the U.S. said they had ​exchanged fire over the weekend.

Iran’s Tasnim news agency reported that Iran and its allied “Resistance Front” were ⁠considering measures to block the Strait of Hormuz and disrupt other key waterways, including the Bab el-Mandeb Strait. ​Crude prices advanced more than 6.5%, adding to concerns for energy-dependent Europe.

Markets know that oil stockpiles are being rapidly ​run down. And the rosy assumptions around the renewal of supplies involved the straits being open by June, no such opening is in sight, and each day brings the crunch point closer, said Chris Beauchamp, chief market analyst at IG Group.

Most major sectors ​finished in negative territory. Energy stocks, by contrast, jumped 1.7%.

Despite the uncertainty, analysts said corporate earnings and forecasts ​have held up better than expected this reporting season, with Goldman Sachs raising its 12-month target for the benchmark STOXX to 660.

The ‌commentary out ⁠of quarter one from a lot of these companies was positive around sales and margins and consumer behaviour, but they all mentioned uncertainty, said Michael Field, a strategist at Morningstar.

So, I would expect when we see earnings being reported for quarter two, we’re going to see a stagnation at the very least, if not a pullback, he ​said, noting that consumer ​sectors were especially vulnerable.