Al-Qaeda leader Ayman al-Zawahiri has called for lone wolf attacks against Western countries, in particular America, and praised recent Palestinian attacks against Israelis.
Zawahiri spoke in a video released on Twitter and published and translated Monday by US-based SITE, which monitors violent extremist websites.
SITE noted that the video was broadcast on Twitter, on Sunday, rather than on extremist websites as is usually the case.
"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."