A man who allegedly impersonated an Enforcement Directorate officer and offered help to Trinamul MP Santanu Sen in lieu of money to “settle” cases Sen said he did not know about, has been arrested.

Police said Sen mentioned in the complaint lodged with Karaya police station that he was first approached by the alleged imposter on July 1 and informed that “several cases” had been pending against the MP with the central agency.

“The caller identified himself as Santanu Maitra, senior special investigating officer of the ED. He told Sen that he would settle the cases against him for money,” said an officer at Lalbazar.

The matter was brought to the notice of Calcutta police and an investigation suggested that the real name of the accused was Chandan Roy, 38, a resident of Dum Dum. “He was not in any way linked to the central agency,” the officer said.

On advice of the police, Sen fixed a meeting with the accused. He told Roy that he would send an assistant to the meeting.

However, instead of Sen’s assistant, cops had gone to meet Roy. The accused was picked up from the Esplanade bus terminus on Thursday night.

Sen said he was thankful to Calcutta police for the “prompt action”.