Police have arrested a 15-year-old boy in connection with a case filed over the killing of a seven-year-old girl in Sadar upazila of Manikganj.

Acting on a tip-off, the juvenile was arrested from Dhaka’s Nawabganj area on Friday night, said Mohammad Sarwar Alam, superintendent of police (SP) in Manikganj, today.

“He is currently in police custody. After interrogation, he will be produced before the juvenile court,” the SP said, adding that drives underway to arrest another accused -- Roni.

Meanwhile, the mother of the child, Atika Akter, filed a murder case against five people, including the teenager, with Sadar Police Station this afternoon, said SP Sarwar Alam.

However, no case has yet been filed over the killing of the arrested teenager’s father and uncle in a mob attack on Thursday night, following allegations that the girl had been murdered.

The SP said no written complaint has so far been submitted by the relatives regarding the mob killing. He added that the family members did not go to the police station to file a case as they were busy burying the bodies. “If they file any complaint, it will be registered as a case,” he said.

According to police and locals, Atika Akter, daughter of Dudal Mia of Bonparil village in Manikganj Sadar, went missing from near her home on Thursday afternoon (April 16).

Following her disappearance, the family took to social media and megaphones to let people know and to locate her. Around 10:00pm that night, locals found Atika’s body in a maize field near her home.

The girl was found with her hands and legs tied, and police suspect she was killed either during an attempted rape or robbery of her jewellery. Atika’s family alleged that a teenage boy was involved.

Around one hour later, agitating people beat up the teenage boy’s elder brother Nazmul, 20, their father Pannu Miah, 45, who is an autorickshaw driver; and Pannu’s brother Fazlu, 28, said locals and police.

On information, police went to the spot. Pannu and Fazlu were killed on the spot and Nazmul was critically injured but was rescued alive by police, said Aminul Islam, inspector (investigation) of Manikganj Sadar Police Station, yesterday.

Nazmul was first taken to Manikganj 250-bed Hospital and later sent to Dhaka Medical College Hospital, he added.

“During the primary investigation, we have found evidence of rape attempt on the girl. However, details will be known after getting the autopsy report,” Aminul told The Daily Star.