India, Oct. 2 -- President Donald Trump said Thursday that Iran may be linked to the FlyDubai copilot who tried to crash an Israel-bound plane as investigators worked to determine why the copilot stabbed the flight's captain, causing the plane to plummet before others on board landed it in Saudi Arabia.

Trump was asked by reporters at the White House whether he had been briefed about any links between the pilot behind the attack and Tehran. He said, "We're working on it right now."

"I would say the answer, based on what I'm hearing, is yes, but we're working on it right now," Trump said. He did not elaborate why he thinks Iran might be involved.

Asked if the US would retaliate against Tehran if it was behind the attack, Trump said, "Oh...