In a statement issued to his fellow jihadists, Al-Qaeda leader Ayman al-Zawahiri praised recent Palestinian attacks against Israelis and called for lone wolf attacks against Western countries, particularly the U.S.

Zawahiri's video was published and translated Monday by U.S.-based SITE, an organization that monitors violent extremist websites, which noted that unlike most instances, the video was posted on Twitter rather than on extremist websites, according to The Telegraph.

"The first matter is striking the West and specifically America in its own home, and attacking their interests that are spread everywhere," Zawahiri said, according to SITE. "The supporters of Israel must pay with their blood and their economy."

As examples of lone wolf attacks, he cited the 2013 Boston Marathon bombers Tamerlan and Dzokhar Tsarnaev who killed three people and wounded 264 with IEDs, according to oneindia.

The Al-Qaeda leader praised the militant group's attacks in the past month against Israelis in Jerusalem and elsewhere in Israel and the West Bank.

He also repeated an appeal first launched in September for jihadists to unite from Turkey to North Africa, reported AFP. This went against his rejection of ISIS' self-proclaimed caliphate, which controls territory in Iraq and Syria.

A U.S.-led coalition of countries has been bombing IS positions since August 2004.