“Our blogging platform was compromised and fabricated blog posts were falsely attributed to several Reuters journalists.”

Among the fake postings was a purported interview with the head of the Free Syrian Army, who was quoted as saying that rebel forces were pulling back after clashes in the city of Aleppo.

Reuters said it did not carry out that interview, that the posting has been deleted and that the blogging platform was taken offline as it addresses the problem.

Syrian opposition fighters told a news conference Friday in Iraq they would not withdraw from Aleppo, the northern city which has been under attack by regime forces.