Al-Qaeda has urged Muslims to avenge the death of a Libyan suspect last week in the United States ahead of his trial for embassy bombings, a monitor said Thursday.
The group's Yemen branch also warned the United States that it would "pay the price" for its "crimes," in a Twitter message picked up by SITE Intelligence Group.
"We say to our Muslim brothers in general and to our brothers in Libya in particular ... revenge must be taken for him, no matter how long it takes," it said.
Abu Anas al-Libi had been due to stand trial on January 12 over the 1998 attacks on the US embassies in Kenya and Tanzania that killed 224 people and wounded around 5,000.
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He was captured by US troops in Libya in 2013 and died last Friday in a New York hospital. He was suffering from hepatitis C and liver cancer.
Al-Qaeda in the Arabian Peninsula (AQAP), considered by Washington to be the jihadist network's most dangerous branch, pledged attacks on US interests, including American civilians and troops.
"We say to America: you will pay the price for your crimes from the blood of your soldiers and your people. We will not stop waging jihad against you and fighting against you, until Allah judges between us and you, and your aggression will be removed from the vulnerable peoples, and Allah will stop your severity," it said.
AQAP said that Libi died in US detention because he was "left without medical care".