The United States was studying whether to put North Korea back on its list of states that sponsor terrorism, U.S. President Barack Obama said in an interview broadcast on Sunday following North Korea's hacking attack on Sony Pictures.
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"We're going to review those through a process that's already in place," he said on CNN's "State of the Union."
"We have very clear criteria about what it takes for a state to sponsor terrorism and we don't make those decisions based on the news of the day. We look systematically at what's been done."
He added: "And based on those facts we'll make those determinations in the future."
Obama reiterated that the United States would respond "proportionately" to the attack, which the Federal Bureau of Investigation has blamed on North Korea.
The attack prompted the studio to cancel its release of The Interview, a comedy about the assassination of North Korean leader Kim Jong Un.
"No I don't think it was an act of war," Obama said. "I think it was an act of cyber-vandalism. It was very costly, very expensive."
The communist state has denied involvement in the hacking attack and has offered to take part in a joint investigation with the U.S.