On Wednesday Belgian police received an anti-terror alert warning that a group of Islamic State fighters recently left Syria and are planning attacks in Belgium and France. There are no immediate plans to raise the security level to the maximum that would indicate an imminent threat of an attack. A source at France's Interior Ministry said Belgian authorities had transmitted a note to their French counterparts, who were currently reviewing the information. ‘We know the threat is very high,’ the source said. The group apparently left Syria about a week and a half ago, aiming to reach Europe via Turkey and Greece by boat without passports. A Belgian security source confirmed the contents of the alert.