Twelve people were killed and 30 others were injured when a bus bound for Zagreb veered off a motorway in northern Croatia and crashed near Varazdin, authorities said.
Sixteen emergency medical teams were dispatched to the crash site.
Thirty-two people were injured in the crash which happened at 3.40am (5.40am) on the highway between Varazdin, in northwest Croatia, and capital Zagreb.
Croatian health minister Vili Beros said 19 people were in a serious condition.
Marcin Przydacz, deputy head of the Polish foreign ministry, who was travelling to the site on Saturday, said the injured were being treated at five hospitals in Croatia.
He said there were 44 Polish pilgrims on the bus driving from Poland to Medjugorje, a Roman Catholic shrine in southern Bosnia, including two drivers. Among them were three priests and six nuns, a ministry spokesman said.
Police cleared the area where the crash took place after firefighters and medical teams recovered all the occupants of the vehicle which had Warsaw registration plates.
(Reuters; Picture Courtesy: EPA)