Hundreds of thousands of Iranians throng Tehran's streets for the funeral of military commander Qassem Soleimani, killed by a US drone strike, and his successor promises to drive US forces out of the region in revenge.

Oil prices rise over 1% on Monday, pushing Brent above $70 a barrel, as rhetoric from the United States, Iran and Iraq fanned tensions in the Middle East after a US air strike which killed a top Iranian military commander.

Iran's ancient and rich cultural landscape becomes a potential US military target as Washington and Tehran lob threats and take high-stakes steps toward a possible open conflict.