India's police are often criticised for providing lax security
More than 90 young offenders have escaped from a detention centre in the northern Indian state of Uttar Pradesh, police say.The offenders, all below the age of 18, removed an iron grille from a window and tied bedsheets together to lower themselves to the ground.
They climbed out of the back of the building in the city of Meerut while police guarded the front.
Thirty-five of the prisoners have since been recaptured, police said.
Senior police official Om Prakash told the AFP news agency that the escape was "done so professionally that no one got a whiff".
The escape was only discovered when some of the prisoners were seen on the road, trying to flag down vehicles early on Monday.
Mr Prakash said that those still on the run included inmates convicted of crimes such as murder, rape, theft and banditry.
More than 31,000 young offenders are being held at detention centres in India, according to one official estimate.