TOPEKA, Kan. (AP) -- The political action committee of the Kansas Chamber of Commerce has spent more than $394,000 on legislative races in the final days before Tuesday's party primaries.

Campaign finance reports filed through Monday show most of the money went for mailings and radio spots for conservative Republicans running for state Senate. The chamber's PAC reported spending nearly $307,000 on Sunday alone.

The chamber is backing efforts by GOP conservatives to oust a dozen moderate Republican senators in primary races. The targeted moderates include Senate President Steve Morris, of Hugoton.

But the chamber also is helping conservative candidates seeking open seats.

Kansas allows PACs to spend unlimited amounts on ads promoting candidates if those activities aren't coordinated with the candidates.