He sought Sarma's explanation in a letter sent to the minister, said Bharat Narah, press adviser to Chief Minister Tarun Gogoi in a release here today.
The private news television channel is owned by Sarma's wife.
Singh informed this in a letter to the chief minister as well in which he also congratulated Gogoi for the party's landslide victory in the recent panchayat polls, the release said.
There have been rumours and media reports about an alleged revolt in Congress legislature party against Gogoi and a six-member core committee has been formed by the party to resolve the issue.
A signature campaign was launched during the day among Congress legislators in support of Gogoi following reports of a meeting by about 25 MLAs and their supporters at a senior legislator's residence here last night against the chief minister's alleged autocratic and vindictive style of functioning and sidelining them in the government.
The 25 MLAs have, however, denied that last night's meeting was against Gogoi and told the media that their gathering at the legislator's residence was part of their regular practice.