They were rescued from Allahabad junction by government-run Railway Childline and taken to a shelter home, where their limbs were tied after they tried to run away, senior officials said.
"The children in their statement to the magistrate said Gulab Yadav had promised them jobs that could fetch them up to Rs 6,000 a month. On the magistrate's directions, they were taken to the Kalyan Seva Samiti shelter home in Phaphamau," Additional District Magistrate (City), Allahabad, Punit Shukla told PTI.
"They were ordered to be kept there till their family members took them home. However, the children got agitated and hit some staff members on being stopped from running away," Mr Shukla said.
The staff of the shelter home have admitted to tying the children with pieces of cloth, but only for a few minutes and as a desperate measure, he said.
"Nevertheless, it is an offence and those responsible are likely to face punishment. The district probation officer has also recommended the removal of the shelter home's superintendent," Mr Shukla said.
He also took exception to an NGO which shot a video of the children, shared it on social media and aired by a number of news channels. "As per the Juvenile Justice (Care and Protection of Children) Act, clicking photographs and shooting videos inside a shelter home is strictly prohibited.
"Even if the NGO had flouted the rules with a bona fide intention, it should have shared the video with the officials concerned only. The people involved in the exercise, too, may face punishment as per law," he said.