Turkey's state-run news agency says a bus carrying migrants hoping to reach Greece has crashed into a car in northern Turkey, killing four people and injuring 30 others.

Anadolu Agency says the bus carrying migrants from Syria, Afghanistan and Myanmar slammed into the car on a bridge in the province of Canakkale and fell onto the river bed. The crash killed two people inside the bus and two passengers riding in the car.

The migrants were being driven toward Turkey's northern Aegean coast from where they would have attempted to cross to the Greek island of Lesbos, according to the private Dogan news agency.

This week, the bodies of 36 migrants washed up on Turkey's coast after their boats capsized in rough waters on their way to Lesbos.

The European Union said Thursday Turkey is not doing enough to decrease the flow of migrants into Europe. The EU has offered Turkey 3 billion euros ($3.26 billion) in aid and political concessions, including easing of visa restrictions, in exchange for increased cooperation to stem the flow of migrants.