National Disaster Response Force personnel left the spot, while State Disaster Management Department personnel continued their rescue work at the accident site with cranes, earth movers and drilling machines.
Officials in the power department said industrial demand (which accounts for 40 per cent of the state's power consumption) didn't rise last year, contributing to surplus power.
The Election Commission's decision is "unfortunate", highly arbitrary, motivated and "biased" and was taken at the behest of the Bharatiya Janata Party, she said in the letter.
It was the state government which has violated human rights and slapped false cases against the GJM, he claimed.
An eyewitness said some people in a minibus and private cars were trapped.
The police lodged a suo motu case against unknown persons in connection with their involvement in the mishap, a police officer said.