AFP’s management made a public statement regarding the issue: "Starting at 16:45 GMT, the Twitter account of AFP's photo service @AFPphoto was hacked. The documents posted after that on the account did not originate from the agency."
After the account compromise was detected, Twitter suspended the account and AFP is trying to restore it ever since. The hacker used the account to post photos about the military conflict in Syria.
AFP was also the victim of a phishing attack starting Monday morning. The attack targeted the agency employees’ username/passwords, trying to convince them to login on a spoofed AFP website. AFP security experts claimed that the phishing attack has been unsuccessful. But after the Tuesday hacking of the agency’s Twitter account, it seems that the hacking episodes may probably be related.