Trump hopes to "avoid" war with Iran

US President Donald Trump declared Monday that Tehran was likely behind strikes on Saudi oil facilities, but that he wanted to be sure and he hoped to "avoid" war.

"It is certainly looking that way at this moment," he told reporters when asked if he believes Iran carried out the attack.

Trump said "we pretty much already know" but that Washington still wanted more proof. "We want to find definitively who did this."

"With all that being said, we'd certainly like to avoid" war, he said. "I don't want war with anybody but we're prepared more than anybody."

Trump on Monday promised to supply oil to US allies, after attacks on Saudi oil infrastructure that Washington has blamed on Iran.

"We are a net Energy Exporter & now the Number One Energy Producer in the World," Trump tweeted.

"We don't need Middle Eastern Oil & Gas, & in fact have very few tankers there but will help our Allies!" he added.

Trump's comments come after weekend drone strikes on two major oil facilities in Saudi Arabia, which slashed the country's oil production by half and led both the kingdom and the United States to announce they may tap into their strategic reserves.