Oil prices surged on Thursday after Donald Trump indicated that the U.S. would continue strikes on Iran, including targeting energy and oil infrastructure in the coming weeks, without committing to a clear timeline for ending the conflict, The Caspian Post reports, citing foreign media.

Brent crude futures climbed $4.88, or 4.8%, to $106.04 per barrel by 0200 GMT.

Meanwhile, US West Texas Intermediate crude rose $4.17, or 4.2%, reaching $104.29 per barrel.

The sharp gains followed earlier losses of more than $1 for both benchmarks ahead of Trump’s speech, after they had already closed lower in the previous session.