In the early hours of Saturday, twelve people were killed and many injured in an accident of a Polish bus north of the Croatian capital, Zagreb.
The bus slipped off the road on the A 4 motorway and landed in a ditch.
All the casualties were Polish citizens, according to a Polish foreign ministry spokeswoman.
Polish Prime Minister Mateusz Morawiecki confirmed on Monday that 11 dead and 34 injured as well as 11 dead. He said that he had sent health and deputy foreign ministers, Adam Niedzielski and Marcin Przydacz, to the site of the accident.
According to Morawiecki, the bus was carrying pilgrims to the Catholic pilgrimage site Medjugorje in southwestern Bosnia and Herzegovina.
The Polish health ministry spokesman Lukasz Jasina later confirmed that the 12th person had died in the hospital.
We have more deaths - the twelfth person. Jasina told Polish TV channel TVN 24 that she had died and the victim died in hospital.
The Croatian newspaper Vecernij List reported on its website that five injured tourists were in serious serious condition.
The wounded people were transported to hospitals in Zagreb and Varazdin according to the Croatian fire service.
Croatian public television HRT said that the driver was most likely to have fallen asleep.