Oil prices rose on Monday in Asia after US President Donald Trump warned Iran the "clock is ticking" as talks to bring the war to an end have stalled.
The global benchmark Brent crude was 1.7% higher at $111.13 (£83.44), while US-traded oil was up by 2.1% at $107.62.
Energy markets have been on a wild ride after Iran effectively closed the key Strait of Hormuz waterway in retaliation for US and Israeli strikes on the country, which started on 28 February.
Around a fifth of the world's oil and liquefied natural gas (LNG) usually passes through the narrow shipping route.
"They better get moving, FAST, or there won't be anything left of them," Trump wrote on social media. "TIME IS OF THE ESSENCE!"
Iranian media meanwhile reported Washington had failed to make any concrete concessions in