US President Donald Trump on Sunday night commented on the case of missing former FBI agent Robert Levinson.

"If Iran is able to turn over to the U.S. kidnapped former FBI Agent Robert A. Levinson, who has been missing in Iran for 12 years, it would be a very positive step. At the same time, upon information & belief, Iran is, & has been, enriching uranium. THAT WOULD BE A VERY BAD STEP!" he wrote on Twitter.

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