A six-year-old girl who died at an education centre might have plunged from a third-floor window after becoming locked inside a toilet, a coroner said yesterday. Andrew Chan Hing-wai was sufficiently concerned about the possibility to visit the scene to examine the toilet door. After hearing evidence, he suggested Primary One student Wu Ming-lai could have tried to climb out of the window when she was unable to open the door. Ming-lai died from head injuries after falling from the window at the Man Dick Education Centre, where children received extra-curricular tuition, in Java Road, North Point, on June 4 last year. Mr Chan said: 'If Wu Ming-lai couldn't open the toilet door, she might have wanted to get close to the window so she could yell for help, or even tried to escape through it.' The court heard a government expert examined the toilet door and found its lock tight and difficult to turn, even for an adult. Tutor Wong Wai-hing, 21, said she walked Ming-lai to the toilet and then returned to the classroom to take care of other children. She returned five minutes later but found the door locked. The post-mortem examination revealed Ming-lai suffered fatal head injuries caused by falling from a height. The left side of her skull was cracked to her temple, the coroner heard. Small footprints were found on the toilet seat. When Ming-lai had stood on the seat, she would have been able to reach the window, the court was told. Paint from the window frame was also found under her fingernails, suggesting she had tried to get out through the window, the coroner said. Mr Chan will give his verdict on Tuesday.