Time Warner Cable declined to comment to CNBC on an earlier report of an intent to drop the bid.
A spokeswoman for the Federal Communications Commission also declined to comment. A spokesman for the Department of Justice told CNBC the agency would continue its review of the proposed deal and it was "not aware of anything" related to a dropped merger bid.
Disclosure: Comcast is the owner of NBCUniversal, the parent company of CNBC and CNBC.com.
—CNBC's David Faber contributed to this report.