Cable company Comcast’s cable TV division is the target of a merger that would bring Comcast’s video service to consumers as well as online rivals, the company’s chairman said.

Cablevision has agreed to buy MediaWorks, the parent company of cable TV service Dish Network, for $10.2 billion, according to people familiar with the matter, in a deal that is the latest in a string of mergers that have pushed the sector into uncharted territory.

Comcast is one of the largest cable operators, but the move has attracted scrutiny from regulators in the U.S. and Europe because of its reliance on its video service.

The deal would be the second-largest deal Comcast has completed in the past year, following a $2.7 billion deal with Viacom Inc. last month.

Both Comcast and Viacum are controlled by AT&T Inc., which controls Time Warner Inc. and other major U.T. providers.

Comms chairman and CEO Brian Roberts said in a statement that the deal would bring together Comcast’s Cablevision and MediaWorks video offerings into one company.

The move is a direct challenge to Dish Network and the online rival Hulu, which have both focused on video and already own TV channels.

In July, Dish announced that it had reached an agreement with its new owners to acquire all of Hulu’s content, including movies and TV shows, in an effort to bolster its cable service.

The deal would create the second major cable operator, after Comcast’s own NBCUniversal.

Comics publisher Image Comics is part of the deal.