Law enforcers are still in the dark about whereabouts of the missing students and whether they are involved in militancy.
Their disappearances have caused a widespread concern that some students remained missing earlier were found involved in the violent militant attacks in Gulshan and Sholakia.
Against the backdrop of the incidents, law enforcement agencies have geared up their hunts for the students in recent times.
After a preliminary investigation, law enforcers and intelligence branches are almost sure that the students might have left their homes to get involved in militancy.
Last week, at least nine students of different educational institutions in the capital and elsewhere in the country disappeared, raising a growing concern.
Meanwhile, law enforcers have traced one of the missing students in a massive drive in the capital.
Eight other students, including two students of North South University and four medical students of Panba, are still missing, prompting law enforcers to step up manhunts.
After eight days of his missing, Niamatullah, 16, a madrasa student of Agailjhara upazila in Barisal, was found at Gendaria in the capital on Friday. He started work at a restaurant.
Law enforcers handed him over to his family as police did not find his involvement in any militant acts.
Law enforcers, including police, detectives and RAB personnel, are carrying out massive hunts for the students, detective sources said.
RAB official Mufti Mahmud Khan said the elite force is working round the clock to trace the students.
“Our intelligence wing is also working to dig out the reasons behind their mysterious disappearances.We are yet to trace them,” he added.
On December 1, four youths -- Shafayat, Jain, Mehedi and Suhujon -- went missing from Banani in the capital. Four students of Pabna Medical College went missing.
Several of the missing students were found involved in the deadly militant attacks on Gulshan café and Sholakia Eid congregation premises.
Nine of the missing youths were killed during a police raid on a house in Kalyanpur in the capital in recent past.
Besides, five youths, who were involved in militancy after leaving their homes, were arrested in a RAB drive in Chittagong on Thursday.
Home Minister Asaduzzaman Khan Kamal has said recently that law enforcement agencies are working to hunt down all militants. The missing students are on their watch.