Qatar's Foreign Ministry spokesperson said the two sides were considering fresh proposals from mediators to resolve their differences. However, Iran's national security chief said in a social. Oil prices swung as traders weighed mixed signals on US-Iran peace talks and recovering Gulf exports. Brent crude traded at $104.27 a barrel. Find Brent Crude Latest News, Videos & Pictures on Brent Crude and see latest updates, news, information from NDTV.COM.