The children were rescued yesterday by a team of city police, SDM Punjabi Bagh, Child Labour Department and NGO Bachpan Bachao Andolan.
Police arrested Avdesh Yadav, Pramod, Mujib Alip, Shahnoor Khan and Abdul Majid and registered a case under relevant sections of Child Labour Act and Juvenile Justice Act.
"During investigation, it came out that nine children were from Uttar Pradesh and three children from Bihar. All of them were engaged as labourer on wages ranging from Rs 3,000 to 4,000 per head," said Deputy Commissioner of Police (West) Ranvir Singh.