The Latest on migrants and asylum-seekers in Europe (all times local):

11:45 a.m.

Police in the northern Greek city of Thessaloniki are investigating a possible racist motive in the firebombing of an apartment housing a family of ten Iraqi migrants.

The attack overnight Tuesday caused no injuries and minor damage. Police say a petrol bomb was thrown onto the balcony of the ground-floor apartment, and the fire was extinguished by residents.

Police say a witness reported seeing two men fleeing the scene of the attack. The case is being handled by the department for racist crimes.

Greece is a major arrival point for migrants entering illegally from Turkey who seek a better life in Europe.

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10 a.m.

Croatian police have discovered several dozen migrants hidden in a truck and detained two suspected people smugglers.

Police say a patrol stopped the truck with Slovenian license plates early on Tuesday near Gracac, in southern Croatia close to the Adriatic Sea coast.

Authorities are working to establish the identity of the migrants who can now seek asylum in Croatia, a European Union member country. Croatia's state TV says they are mostly from Bangladesh, Pakistan or India.

Thousands of migrants are traveling through the Balkans aiming to reach Western Europe. From Croatia, migrants go to Slovenia, Austria and other wealthy EU nations.

Migrants mostly rely on people smugglers to take them across the borders illegally.