Officially the U.S. has not said it conducted previous airstrikes in Yemen, but officials are privately saying the Yemeni military could not have carried out the strikes on its own.

CNN: STORY HIGHLIGHTS

Yemen said Sunday that it had killed 14 suspected militants in the south of the country.

CNN: Al Qaeda claims it killed American in Yemen

Yemen said in July it had arrested members of a spy ring led by a former commander in Iran's Revolutionary Guard, the state news agency Saba said, adding that the cell had operated in the Horn of Africa as well as Yemen.

MSN: Yemen security chief tells Iran to stop backing rebels

Yemen's government said it keeps a close eye on these so-called "Arab-Afghans, " some who lead lawful lives.

CNN: U.S. official: Yemen has 'significant' al Qaeda link

The Associated Press, which first reported the Yemen news, has said it held the news for several days at the government's request.

WSJ: FBI Probes Leaks About Cyberattacks by U.S.

While there was no information another attack by this group was imminent, she said it had been responsible for a number of recent attacks in Yemen, including attempts to kill British diplomats.

BBC: Air freight from Yemen and Somalia banned

The Yemen government says it is cooperating with the U.S., and the CIA is said to be providing intelligence for some of Aden's anti-al Qaeda efforts.

WSJ: Terrorist Attempts Attack on Airplane