Prashant Jha and Preeti Choudhary were brought to the court of the chief judicial magistrate of Madhubani, about 170 km from here, and the couple was sent to a remand home, a police official said.

A police team brought the teenaged couple from New Delhi to Madhubani late Thursday after they were spotted in south Delhi's Mehrauli area Monday.

They had stayed at Ranchi in Jharkhand, Jammu and Kashmir and Darjeeling in West Bengal before reaching Delhi by train. They were detained after they failed to provide proper identity proof.

Prashant Jha, a Class 10 student, went missing along with Preeti from his school last month. A week after a missing person complaint was lodged with police, an unclaimed headless body was recovered by police in Madhubani early this month.

On being shown to his family members, they identified the body as that of Prashant, police said.

But Bihar Police refused to hand over the body to his family without confirmation of the identity, police said.

After that, the district witnessed violent protests last Friday and Saturday in which three youths were killed in police firing and nearly a dozen people were injured.

Opposition parties enforced a daylong shutdown in Bihar Monday to protest the killings in the police firing in Madhubani.

Superintendent of Police Ranjeet Kumar Mishra said that 30 first information reports (FIRs) have been filed in connection with the violence and 17 people have been arrested.