New Delhi, April 21 -- Brent crude oil prices surged above USD 90 per barrel amid rising uncertainty over the expected second round of peace talks between the United States and Iran, which were anticipated to take place in Pakistan.

According to reports, delegations from the United States and Iran were expected to arrive in Pakistan on Tuesday for discussions, signalling a potential diplomatic breakthrough in the ongoing tensions. However, the anticipated talks have not materialized so far, adding to market concerns and volatility in global energy prices.

The uncertainty deepened after indications emerged that key officials had not yet departed for the talks.

Iran on Tuesday denied that any delegation has travelled to Islamabad for the...