BAY CITY, Mich. (AP) — Expressions of regret are pouring in from Michigan's congressional delegation after the shooting of U.S. Rep. Gabrielle Giffords in Tucson in which six people died.

Rep. Gary Peters, D-Bloomfield Township, served with Giffords on the House Science and Technology Committee in the last session of Congress. He says he grieves for those killed and prays for the "speedy and full recovery" of her and the other wounded.

Rep. Candice Miller, R-Harrison Township, says she and Giffords share an interest in border security and the space program. Miller says she's "deeply saddened by this senseless crime."

Like Giffords, then-U.S. Rep. Bart Stupak of Michigan received threats for supporting a health care overhaul bill. The suspect is undergoing tests for dementia before trial in Bay City federal court.