WICHITA, Kan. (AP) — The Sedgwick County District Attorney is investigating Wichita Mayor Jeff Longwell’s actions regarding a city contract for a new water plant.

District Attorney Marc Bennett said Thursday in a news release that his office received several concerns from one individual after The Wichita Eagle reported Sunday that Longwell steered the contract to a partnership that included friends of his.

Bennett’s spokeswoman, Georgia Webb, said the office would not release details about the concerns.

The Eagle’s report said Longwell persuaded the City Council to give the nearly $524 million...