Hong Kong stocks pulled back Thursday as investors remained cautious after U.S. President Donald Trump said operations against Iran would continue without outlining a timeline for an end.

The Hang Seng Index fell 177.50 points, or 0.7%, to close at 25,116.53, while the Hang Seng China Enterprises Index dropped 47.89 points, or 0.6%, to 8,456.92.

In a prime-time address, Trump said the U.S. could step up strikes against Iran in the coming weeks, while indicating key military objectives were within reach.

"We are going to hit them extremely hard over the next two to three weeks. We are going to bring them back to the Stone Ages, where they belong," Trump said in a nationally televised address, Reuters reported.

He did not provide further details on the scope or duration of the campaign.

The lack of clarity also kept energy markets on edge, with oil prices jumping nearly 7%, raising concerns about prolonged supply disruptions.

Hong Kong's stock market will be closed from Friday through Tuesday for the Good Friday, Ching Ming Festival, and Easter holidays, and will reopen on Wednesday, April 8.

In corporate news, Leoch International Technology (HKG:0842) closed nearly 77% higher after scrapping the spin-off and U.S. listing of its Leoch Energy unit.

Chery Automobile (HKG:9973) advanced over 15% after March vehicle sales rose 15% year on year to 228,451 units across its five brands.