LUCKNOW, Dec. 1 -- Uttar Pradesh faces a massive Aadhaar backlog, with over 2.5 crore individuals over 15 years of age yet to update their biometric details, as per information provided by Unique Identification Authority of India (UIDAI) officials.

Also, 1.4 crore children between the ages of 5 and 15 years have yet to complete their Aadhaar updates, including necessary biometric revisions, despite targeted efforts in schools, confirmed UIDAI's deputy director general (regional office, Lucknow) Prashant Kumar Singh.

Lucknow, Noida, Agra and Meerut are among the U.P. cities with high pendency.

Even as Aadhaar enrolment covers 57.86 lakh children under five and 5.90 crore aged five to 15 years in UP, UIDAI has expanded its statewide upda...