Other footage showed a house with a roof caved in. The reporter said she did not know if anyone was inside.
Tomislav Fabijanic, head of emergency medical service in Sisak near Petrinja, said there were many injured in Petrinja and in Sisak.
“There are fractures, there are concussions and some had to be operated on,” he said,
Slovenia’s STA news agency said that the country’s sole nuclear power plant which is 100 km from the epicentre was shut down as a precaution.
There was no further information available on casualties.
The quake could be felt in the capital Zagreb, where people rushed onto the streets, some strewn with broken roof tiles and other debris. It was also felt in neghbouring Bosnia and Serbia.