A 75-year-old retired civic official has allegedly been duped of Rs 16.5 lakh by cyber fraudsters who posed as ATS and NIA personnel and placed him under "digital arrest" for interrogation, claiming his name surfaced in the Delhi bomb blast case, police said, reported news agency PTI.

The victim, a resident of Andheri (East) in Mumbai, approached the West Region Cyber Police Station on Monday, an official said on Wednesday, reported PTI.