Oil fell Monday amid news that both the U.S. and Iran seek diplomatic options to their conflict.
Futures for international benchmark Brent crude for January delivery fell 3.31% to $109.67 a barrel. U.S. West Texas Intermediate futures for December declined 3.34% to $100.64 per barrel.
U.S. Secretary of State Marco Rubio said that President Donald Trump prefers not to use military force and would like to resolve the Iranian war "diplomatically."
Trump "hasn't made a decision...what the president expresses to you is incredible confidence that if we needed to do something militarily, we would have the ability to do it, and we really we have everything we need to be successful. But we would prefer to do it peacefully," Rubio said, speaking to reporters over the weekend.
Iranian authorities also signaled that a deal is still possible, following two days of talks mediated by Qatar, as long as demands are implemented tangibly, according to Al Jazeera.
The news come following reports that both the U.S. and Iran are preparing for more military strikes after the midterm elections.
Reports from The Wall Street Journal and The New York Times indicate that the U.S. is preparing for possible renewed military actions after the Nov. 3 midterm elections.
Iranian Supreme Leader Mojtaba Khamenei on Saturday called for Tehran's armed forces to meet "any level or type of threat" with "an immediate, impactful, and geographically unrestricted response."
Concerns over the Middle East and Ukraine conflicts will likely linger in the near term.
"Attacks on ships and refineries in the Middle East and on civilians in Ukraine continue, doing little to inspire confidence in the prospects for lasting ceasefires in the foreseeable future," said Tamas Varga, analyst at PVM Oil Associates.
"Nonetheless, hope springs eternal," Varga added.
—CNBC's Lim Hui Jie contributed to this report.
