The arrests were made last evening in Kalyan, Superintendent of Police, ACB Thane, Datta Karale told PTI.
According to the SP, the traffic unit of Khadkpada in Kalyan had detained a trailer which was transporting a transformer.
The transporter wanted the trailer to be released for which he approached the police inspector, in-charge of the Traffic department at Khadkpada.
Inspector Arun Joshi (52) made a demand of Rs 10,000 for releasing the trailer, he said.
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The transporter then lodged a complaint with the Thane Unit of the ACB which laid a trap and caught Traffic Warden Afan Pandey (22) accepting the money on behalf of the police officer.
Pandey received the agreed amount of Rs 8,000 at a place near Khadakpada last evening, the ACB official said.
Offences under sections 7,13(1)(d) and 13(2) of the Prevention of Corruption Act 1988 have been registered against the duo.