Turkey's state-run Anadolu Agency says authorities in northwest Turkey have rounded up some 1,300 migrants allegedly preparing to make their way into Greece.

Anadolu Agency says the migrants were detained on Monday in a sweep in the town of Ayvacik, which is a main crossing point to the Greek island of Lesbos. The migrants were from Iran, Iraq, Afghanistan and Syria, it said.

Anadolu said authorities also detained four suspected smugglers.

The move came a day after Turkey and EU leaders sealed a joint summit with a commitment to re-energize Turkey's long-stalled membership bid and bolster their resolve to deal with the Syrian refugee crisis.

Further details about Monday's sweep weren't immediately available.