A search is still ongoing for a 10-year-old girl who disappeared in the swollen Dragonja river on Thursday night as a group of migrants attempted to cross the Croatian-Slovenian border, Istria County police said on Friday.

The police said that a Turkish woman, the mother of the missing girl, had been rescued from the river. They added that a document they had found indicated the child had disabilities.

About 40 Croatian police officers and divers have been joined by Slovenian divers in the search for the missing girl, Istria County police spokeswoman Suzana Sokac said at the Plovanija border crossing point.

The chief of police in the Istrian town of Buje, Boban Robin Paulovic, said that Croatian and Slovenian firefighters and hunters had also been involved in the search. He said that the search was hampered by rugged terrain and that drones were also being used.

“I hope we will find the child in good shape, although time is running out,” Paulovic said.

The girl’s mother is recovering in the city of Pula hospital and is expected to be discharged later today. According to unofficial sources, she is also the mother of the 5-year-old and 13-year-old boys who were found, while the 18-year-old is her nephew.

The Dragonja river is not very deep at the spot where the migrants were found, but has swollen due to heavy rains and the currents there are very strong.