TOPEKA, Kan. (AP) — A group run by the sister of the chairman of the Kansas Chamber of Commerce sent postcards warning that renewable energy standards caused higher utility bills, but the chamber denies involvement in the postcards.

The Kansas House last week rejected legislation meant to end the state’s renewable energy standards, which require utility companies to get 20 percent of their power from renewable sources by 2020. The chamber of commerce pushed for the standards’ repeal.

The Wichita Eagle reports postcards from Kansas Senior Consumer Alliance, run by Virginia Crossland-Macha, went out in multiple House districts before the vote. The cards warned the standards were responsible for rate increases.

Crossland-Macha’s brother, Ivan Crossland, leads the Chamber of Commerce. A chamber spokeswoman says she and her colleagues didn’t know about the postcards.