July 20 (Reuters) - Ryanair CEO Michael O'Leary said on Monday that an initial finding from a probe into an incident in which a passenger was partly sucked out of a Boeing 737's broken window suggested "foreign object damage."

"Initial indication would suggest it looks like a foreign object damage to the engine on takeoff at Thessaloniki, but we don't have, we can't say that definitively," O'Leary told analysts while presenting Ryanair's results for the April-June quarter.

He added that a draft report on the incident would be issued in about 28 days, followed by a more detailed report.

(Reporting by Conor Humphries in Dublin, writing by Alessandro Parodi in Gdansk, editing by Matt Scuffham)

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