BRUSSELS: EU foreign affairs chief Catherine Ashton on Friday said she was "appalled" by the attacks in the northern Lebanese city of Tripoli and called for a swift investigation.
Powerful car bombs exploded outside two Sunni mosques in the city, leaving 42 people dead and 500 wounded, the highest toll in an attack since Lebanon's 1975-1990 civil war.
Ashton "condemns this terrorist attack in the strongest terms and reaffirms that terrorism and any use of violence against civilians are completely unacceptable," a statement from her office said.
"She calls for a swift investigation into the events and to bring the perpetrators to justice."
The attacks, which come a week after a bombing in the Beirut bastion of Hezbollah, a close ally of Bashar al-Assad, risk exacerbating tensions between supporters and foes of the Syrian president.