Air strikes kill 22 Qaida-linked militants in Syria

This image posted on the Twitter page of Syria's al-Qaida-linked Nusra Front on Friday, April 1, 2016, shows Nusra Front tank fires at Syrian troops and pro-government gunmen in the northern village of al-Ais in Aleppo province, Syria. The Britain-based Syrian Observatory for Human Rights says 12 Hezbollah fighters were killed and dozens were wounded in Saturday's attack by militants led by al-Qaida's Syria branch — known as the Nusra Front — on the northern village of al-Ais. The title in Arabic that reads "introduction attacks with heavy weapons on al-Ais." (Al-Nusra Front via AP) (The Associated Press)

A Syrian soldier surveys damages at Mar Elian monastery in Qaryatain, near the central city of Homs, Syria on Monday, April 4, 2016. Qaryatain used to be home to a sizable Christian population and lies midway between Palmyra and the capital, Damascus. Activists said last summer that Qaryatain had a mixed population of around 40,000 Sunni Muslims and Christians, as well as thousands of internally displaced people who had fled from the nearby city of Homs. Many of the Christians fled the town after it came under attack by IS.(AP Photo) (The Associated Press)

A general view shows damages at Mar Elian monastery in Qaryatain, near the central city of Homs, Syria on Monday, April 4, 2016. Qaryatain used to be home to a sizable Christian population and lies midway between Palmyra and the capital, Damascus. Activists said last summer that Qaryatain had a mixed population of around 40,000 Sunni Muslims and Christians, as well as thousands of internally displaced people who had fled from the nearby city of Homs. Many of the Christians fled the town after it came under attack by IS.(AP Photo) (The Associated Press)

A monitoring group says an airstrike on an al-Qaida affiliated headquarters in northern Syria has killed at least 22 militants, including a senior Qaida-linked spokesman.

The Britain-based Syrian Observatory for Human Rights says jets thought to belong to the Syrian or Russian Air Forces targeted the headquarters of Jund al-Aqsa, an extremist group that fights alongside the Nusra Front, al-Qaida's affiliate in Syria, Sunday night.

A media outlet belonging to the Lebanese militia Hezbollah says the strike killed the Nusra Front's official spokesman, Radwan Namous, also known as Abu Firas al-Souri, and his son.

Hezbollah has sent thousands of its fighters to fight alongside Syrian government forces in the country's five-year civil war.