Citing documents obtained from a "highly secret location", Netanyahu claimed during a TV address to his country that Iran secretly worked to produce nuclear weapons after signing the Iran nuclear deal that eased sanctions against the Islamic Republic in exchange for a halt to nuclear weapons research.
US West Texas Intermediate crude for June delivery was up 11 cents, or 0.2 percent, at $68.68 a barrel by 0114 GMT, after settling up 47 cents on Monday.
London Brent crude for new July delivery was up 11 cents at $74.80. The June contract expired on Monday, settling up 53 cents at $75.17.
Experts say the oil market is particularly sensitive to any developments on the nuclear deal and sanctions. Oil prices have risen this month to their highest since late 2014, driven by concerns over potential disruptions to Iranian crude flows.
Iran has dismissed Netanyahu's accusations, calling them "propaganda."
"Pres. Trump is jumping on a rehash of old allegations already dealt with by the IAEA to "nix" the deal. How convenient. Coordinated timing of alleged intelligence revelations by the boy who cries wolf just days before May 12. But Trump's impetuousness to celebrate blew the cover," Iranian Foreign Minister Javad Zarif said on Twitter.
On July 14, 2015, after several years of diplomatic work, the European Union and the P5+1 group of countries signed the JCPOA with Tehran. The accord stipulated a gradual lifting of anti-Iranian sanctions in exchange for Tehran curbing its nuclear program and allowing inspections to ensure that the nature of the program is peaceful.