CAIRO, Egypt - Al-Qaida No. 2 Ayman al-Zawahri, rejecting criticism of attacks by the terror network's followers that have killed thousands, maintained Wednesday that it does not kill innocent people.

His comment came during a 90-minute audio response that was billed as the first installment of answers to the more than 900 questions submitted on extremist Internet sites by al-Qaida supporters, critics and journalists in December.

"We haven't killed the innocents, not in Baghdad, nor in Morocco, nor in Algeria, nor anywhere else," al-Zawahri said, according to a 46-page English transcript that accompanied the audio message posted on Web sites linked to al-Qaida.

The answer was in response to the question: "Excuse me, Mr. Zawahri, but who is it who is killing with Your Excellency's blessing the innocents in Baghdad, Morocco and Algeria?"

Al-Qaida has claimed responsibility for the Sept. 11 attacks that killed nearly 3,000 people in New York and Washington in 2001, while its affiliates in Iraq, Afghanistan and Algeria regularly set off bombs in crowded urban areas that have taken thousands of lives.

"If there is any innocent who was killed in the mujahedeen's operations, then it was either an unintentional error or out of necessity," al-Zawahri said.