SEOUL, South Korea (AP) — World financial markets were rocked Friday by Britain’s vote to leave the European Union, with stock markets and oil prices crashing and the pound hitting its lowest level in three decades.

The uncharted, unexpected path of a European Union without Britain sparked the sell-offs, with more jitters expected as global markets try to digest the shock result.

Tokyo stocks plummeted nearly 8 percent, their biggest fall since 2008, while South Korea’s Kospi tumbled about 3 percent.

Crude oil prices and U.S. futures also took a big hit, and the British pound plummeted more than 10 percent in six hours while the yen surged about 3 percent to the U.S. dollar as investors seeking safety snapped up the Japanese currency.

By early afternoon in Asia, a tally by the BBC showed Britain had voted to leave the 28-nation European Union by about a 52 percent to 48 percent margin.

On Thursday, Wall Street finished with rallies as pre-poll forecasts showed that Britain would keep the EU membership.

U.S. futures took a dive. Dow futures fell 3.9 percent and S&P futures nosedived 5.1 percent.

Besides the pound’s decline, the fell against the yen and gained against the euro.

Benchmark U.S. crude oil plummeted more than $3, or 6.2 percent, to just above $47 per barrel.