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A team of Delhi Police, with help from local police, arrested Kumar from Chiknauta village under Karza police station in Muzaffarpur, about 70 km from here, early Saturday, a district police official said.
"After he was arrested, Manoj Kumar was produced in the court of the chief judicial magistrate in Muzaffarpur and the court granted a three-day transit remand to Delhi Police," the official said.
Manoj Kumar will be escorted by police first to Patna and then onward to Delhi, the official said.
Meanwhile, the five-year-old victim, from whose vaginal orifice doctors surgically removed a 200-ml bottle of hair oil and pieces of candlesticks, is under treatment at the All India Institute of Medical Sciences (AIIMS) in New Delhi.