Among the personal effects found on Hamas leader Yahya Sinwar was a passport belonging to a UNRWA employee, the New York Post reported.
It belonged to United Nations Relief and Works Agency teacher Hani Zourob who claims to have been in Egypt since last April.
The authorities are not yet certain whether the document is genuine or forged.
It is also unclear what Sinwar intended to do with the document, as the individual in question bears little resemblance to him