US-Iran war, June 30 -- Oil prices declined on Tuesday as investors awaited the outcome of possible US-Iran talks in Doha, even as both sides exchanged missile strikes over the weekend, putting the interim ceasefire aimed at ending the four-month conflict under strain.

Brent crude futures for August delivery, set to expire on Tuesday, fell 1.03%, or 75 cents, to $72.40 per barrel. The more actively traded September Brent contract was down 0.54%, or 40 cents, at $73.51 per barrel.

Meanwhile, US West Texas Intermediate (WTI) crude slipped 0.66%, or 47 cents, to $70.32 per barrel.

Iranian Deputy Foreign Minister Kazem Gharibabadi was quoted as saying by Reuters on Monday that Iranian and Omani experts are expected to begin discussions in ...