ISLAMABAD, Pakistan — A Pakistani judge transferred the case of a Christian teenage girl accused of blasphemy to a juvenile court on Monday, removing the threat of a death sentence and signaling that the case was slowly winding down.

Citing a medical report, Justice Muhammad Azam Khan, of a special court in Islamabad, said that Rimsha Masih, the Christian girl accused of burning pages from a holy book, was 14 years old, and not an adult as her accusers claimed. The juvenile justice system generally applies more lenient sentences, with no death penalties, and does not allow capital punishment for minors.

Justice Khan directed the police to present a revised charge sheet at a hearing on Oct. 1, according to Rao Abdur Raheem, a prosecution lawyer. But it now appears unlikely that Ms. Masih will be tried: police investigators testified on Saturday that they had no evidence that the girl had actually committed blasphemy.

She was arrested Aug. 16 in a slum on the outskirts of Islamabad after neighbors accused her of burning an Islamic textbook. Lawyers for conservative groups pushed for the prosecution, but after arguments about her age and mental health, she was released on bail this month. More recently, the Muslim cleric who led the accusers in the case has been arrested and accused of falsifying evidence against her.