Al Qaeda has released a 35-minute recording the group claims was narrated by its leader Ayman al-Zawahiri, who was believed to have been killed in a US raid in August, SITE intelligence group said yesterday.

The recording was not dated and the transcript did not clearly point towards a time frame for when it could have been made.

Zawahiri was killed in a US strike in Afghanistan, the biggest blow to the militant group since its founder Osama bin Laden was killed in 2011.

Zawahiri had been in hiding for years, and the operation to locate and kill him was the result of "careful, patient and persistent" work by the counterterrorism and intelligence community, a senior US administration official said.

Al Qaeda has not named a successor. But Saif al-Adel, a mysterious, low-key former Egyptian special forces officer who is a high-ranking member of Al Qaeda, is seen by experts as the top contender.

The US is offering a reward of up to US$10 million (RM44.2 million) for information leading to his arrest.

- Reuters