Beijing police said Sunday they had arrested a man who was suspected of abducting a four-year-old girl from the city's leading hospital for children.

The girl has reunited with her parents.

The suspect, surnamed Ren, stole the child from a bench outside a consulting room on the second floor of the Beijing Children's Hospital on March 8, said Wang Wen, a police officer with the Xicheng District Branch of Beijing Public Security Bureau.

The family, from Laiyuan in the neighboring Hebei Province, had taken the feverish child to Beijing for treatment and were dozing off after the girl received transfusion.

The girl's father, surnamed Yan, called police after he woke up and found the child was lost, said Wang.

Video clips from surveillance cameras in and around the hospital showed a man took the child at around 9 p.m., left the hospital and took a bus, he said.

Police interviewed dozens of bus drivers for clues Friday and Sunday. One of them recognized the man, and remembered he got off the bus with the child at a stop in southern Beijing.

"By Saturday afternoon, we were convinced the suspect had traveled to Baoding City in Hebei Province by train," said Wang.

Ren was seized at Baoding's railway station at 6:30 pm Saturday, a few minutes after he got off the train with the child in his arms.

He told police that one of his acquaintances had promised to pay him 10,000 yuan for a girl.

The girl has reunited with her parents.

The case is under further investigation.