Hamas leader sitting shiva for his son....

His son is dead to him because he worked for Israel...

A Hamas leader has disowned his son after the younger man claimed he spied for Israel.

Hamas Web sites quote a letter by Sheik Hassan Yousef disowning the son. Hamas says the letter was smuggled out of the Israeli prison where he is being held.

The elder Yousef, who helped found the militant Islamic group two decades ago, was humiliated last year when his son Mosab announced he had converted to Christianity. Then the son told an Israeli newspaper that he had helped Israeli intelligence foil militant attacks and hunt down Hamas leaders.

Monday's announcement means the son loses his inheritance and the family will never speak to him — or about him — again.