A teenage sleepwalker was rescued after being found fast asleep 130 feet up on the arm of a crane, police said Wednesday.

　　Emergency services were called to a building site in London after a passer-by spotted the 15-year-old girl curled up on top of a concrete counterweight high above the ground.

　　The teen-ager, who has not been named, had climbed up the crane and walked across a narrow metal beam while fast asleep during the incident, which happened on June 25.

　　It is believed the teen-ager had walked out unnoticed from her home near the site in Dulwich, southeast London.She was brought down in a hydraulic lift after a two-hour rescue operation.

　　"Police and London Fire Brigade attended and the woman was brought down from the crane at around 4 a.m. and taken to hospital for precautionary checks," a police spokeswoman said.

　　The girl was unharmed and later went home.