ZAGREB, Croatia—A bus swerved off a highway and crashed in Croatia early Sunday, killing 10 people and injuring at least 44 others—some of them seriously, authorities said. The crash happened at around 6 a.m. (0400 GMT; 12 a.m. ET) near the town of Slavonski Brod on the highway between the capital, Zagreb, and the Serbian border. Photos from the scene showed the bus on the side in the grass near the edge of the road. Firefighters and rescuers could be seen around the bus while traffic on the highway was halted. Police said the bus had Kosovo license plates and was on a regular route from Germany to Kosovo capital Pristina, which is located south of Serbia. The cause of the crash wasn’t immediately known. Officials said the bus was carrying 67 passengers, including children, and two drivers. Local police chief Franjo Galic described the crash as “one of the …