CBI sources said Rafi Ur Rehman, a data entry operator, was caught red-handed, along with a private person, while he was allegedly accepting a bribe of Rs 40,000 from the builder last night.
The builder approached the Central Bureau of Investigation (CBI) with a complaint that Rehman had visited the site in Sangam Vihar where he was constructing apartments, they said.
It said he alleged took photographs of the under- construction flats and asked the builder to meet him in his office.
When the builder reached the SDM's office, Rehman showed him a file containing challans issued to violators earlier, the FIR alleged.
Rehman allegedly demanded Rs 1 lakh to not impose fine on the builder, it said.
After negotiations, the bribe amount was allegedly reduced to Rs 40,000, it said. The CBI laid a trap and arrested the accused and a private person while he was accepting the bribe, it said.