Biden casts doubt on Ahmadinejad's re-election

* Crowd, speech suppression raises doubt about election

* Will withhold comment until after review conducted

* "We don't have enough facts to make a firm judgment"

By David Morgan

WASHINGTON, June 14 (Reuters) - U.S. Vice President Joe Biden on Sunday cast doubt on the re-election of Iranian President Mahmoud Ahmadinejad, saying Tehran's actions against dissent suggest the results may not be clear-cut.

"It sure looks like the way they're suppressing speech, the way they're suppressing crowds, the way in which people are being treated, that there's some real doubt," Biden told NBC's "Meet the Press" when asked if Ahmadinejad had won the vote.

"I have doubts but we're going to withhold comment until we have a thorough review of the whole process and (see) how they react in the aftermath," he said.

Official election results gave Ahmadinejad nearly 63 percent of the vote and only 34 percent for his moderate opponent, Mirhossein Mousavi.

"That's what they're announcing. We have to accept that for the time being. But there's an awful lot of question about how this election was run," Biden said.