Giridhar Rai, who the minister said was a BJP activist, was arrested from his house in Bellare in the Dakshina Kannada District, produced in a court and remanded to judicial custody yesterday, police said.
Upset over not getting any response from the electricity department, Rai allegedly expressed anger when he got the minister over phone and used "derogatory" words against him during the conversation.
"He can't threaten me, so it was my duty to enquire with my officers. I myself spoke to the police officers to take necessary action as per law," he said.
The arrest triggered a controversy with the BJP and JDS slamming the minister and questioning his conduct.
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Former chief minister and Leader of Opposition in the Assembly Jagadish Shettar said, "The entire government, Chief Minister, his ministers have lost patience. They are not ready to listen to ordinary citizens."
Former chief minister and JD(S) leader H D Kumaraswamy alleged that police machinery was being misused in the case.
"The way in which the Power Minister has directed the officers to arrest the man shows that this is not people's government. We will raise the issue during the discussion on the Governor's address (in the Assembly)," he said.
"Is there democracyhere? Is it elected government here?" he questioned.
"Police machinery is being misused to silence those who are discussing the government's functioning," he added.