The Federal Communications Commission is looking into the causes of slower access reported in some Internet service providers, including Comcast and Verizon.

Netflix and Verizon have been at odds at who’s at fault for slower video streaming, with some Netflix customers capturing a screen that stated, “The Verizon network is crowded right now. Adjusting video for smoother playback…” This shift-of-blame didn’t exactly sit well with Verizon, which fired off a “cease-and-desist” letter to Netflix, resulting in the company avoiding mentioning Verizon since earlier this week, according to ABC News.

Since April, Netflix has been paying Verizon for a direct customer connection to improve delivery and has a similar deal with Comcast. The ISPs aren’t holding up their end of the bargain, the content provider is saying.

“Some broadband providers argue that our actions, and not theirs, are causing a degraded Netflix experience,” Netflix spokesman Joris Evers wrote in a company blog post this week. “Netflix does not purposely select congested routes. We pay some of the world’s largest transit networks to deliver Netflix video right to the front door of an ISP. Where the problem occurs is at that door – the interconnection point – when the broadband provider hasn’t provided enough capacity to accommodate the traffic their customer requested.”

The FCC, which has been embroiled in controversy over “net neutrality” rules that would allow ISPs to offer faster service to customers paying a premium, is now playing the role of mediator. Chairman Tom Wheeler and his staff are looking into “precisely what is happening in order to understand whether consumers are being harmed,” ABC News reported.

Wheeler said his agency has access to Comcast-Netflix and Verizon-Netflix contracts and is looking to secure more. He described the process as “collecting information, not regulating,” and that the FCC effort is inspired by consumers’ search for answers and transparency.

According to ABC News, a spokeswoman for Netflix issued this statement: “We welcome the FCC’s efforts to bring more transparency in this area. Americans deserve to get the speed and quality of Internet access they pay for.”

Comcast has not commented yet. A erizon spokesman said, “ … We are hopeful that policy makers will recognize this fact and that the Internet will continue to be the engine of growth of the global economy.”