RALEIGH, N.C. (AP) — A clean-energy advocacy group wants an investigation into whether a North Carolina legislator is violating ethics laws by doing legal work for a Duke Energy Corp. gas pipeline project while also pushing legislation the company wants.

The group NC WARN filed a complaint Wednesday with the State Ethics Commission asking for an official look at the connections between country's largest electricity company Energy and state Sen. Dan Blue, a Democrat from Raleigh.

Blue called the complaint baseless.

NC WARN says Blue's law firm is collecting fees for suing dozens of landowners to make way for the proposed Atlantic Coast Pipeline, a project partly owned by Duke Energy. Blue also is sponsoring legislation that would allow the company to get multi-year rate increases with billions of dollars in construction costs projected.