A spokesman for a top Taliban leader in Pakistan denied Saturday a US media report that al-Qaida's No. 2 leader, Ayman al-Zawahri, may have been critically wounded or killed in a missile strike in recent days. CBS News reported Friday it had obtained a copy of an intercepted letter from unidentified sources in Pakistan which urgently requested a doctor to treat al-Zawahri. The letter was purportedly from Taliban leader Baitullah Mehsud and said al-Zawahri was in "severe pain" and his "injuries are infected." Mehsud spokesman Maulvi Umar said, "We deny it categorically." Pakistan army and intelligence officials also said they had no information that al-Zawahri was hit in a missile strike reported Monday in South Waziristan.