The US Department of Justice will join the Federal Communications Commission in reviewing Comcast's $30 billion deal to take control of General Electric's NBC Universal.

Comcast's proposed deal with General Electric for NBC Universal would hand the country's number 1 cable operator control of a major broadcast network, 26 TV stations, several cable channels and a movie studio. Many public interest groups have expressed concern over the concentration of media outlets in a single company. Comcast and NBC each also has a visible presence in online video content, a big growth area.