The incident occurred in the presence of Prime Minister Manmohan Singh when Subhas Sen, a secretary of the Assam unit of All India Central Council of Trade Unions (AICCTU), interrupted Labour Minister Mallikarjun Kharge's speech to lodge his protest.
The disruption caught everyone by surprise as Kharge tried his best to stop the union leader. The Minister had just begun to deliver his address when Sen sprang up from his seat at the Vigyan Bhawan here condemning the "assassination" of the worker.
"There was a state wide bandh following the incident and on April 1, the state chief minister promised a CBI probe in the state Assembly. But it is now more than one-and-half months and the CM has not found time to send a formal letter to the investigation agency," he claimed.
As he was speaking, the Minister chose to go ahead with his speech. The episode lasted a couple of minutes before Sen took his seat. The PM spoke later on.
"However, he chose to spoke at the inaugural function, which was unbecoming of him," they said.