The cash was seized from Chandramouli, who was travelling in a bus from Hyderabad to Karimnagar at Bollarum check-post, they said, adding he was subsequently arrested.
"When we searched the bus at the check-post we found this huge unaccounted amount from one passenger identified as Chandramouli. As per his version, he is an activist of TDP," Bollarum SHO G Jagan said.
The money has been handed over to I-T department and it will be returned only after submission of necessary documents, police said.