A Pashtu television station reported on July 29 that Zawahiri was killed in the same attack that killed Abu Khabab in South Waziristan. The news broke in the U.S. this afternoon via Stratfor. CBS reported this evening that Zawahiri was badly wounded in the attack. (See the news summary here.)
Bill Riggio is right to urge that the report of Zawahiri’s death be treated with extreme caution since it is based on the word of an anonymous Pakistani official. Pakistani intel previously lied about the death of Abu Khabab and Zawahiri.
I did a thorough search of Ekhlaas and turned up nothing. I’ll check other forums tomorrow. By way of comparison, the news of Abu Khabab’s death surfaced on Ekhlaas only a few days after the U.S. missile strike in South Waziristan.