WASHINGTON — The gunman who targeted Republican congressmen this week at a baseball field in suburban Washington was carrying a list with the names of at least three lawmakers, and had pictures of the ballpark stored on his cellphone, two law enforcement officials said on Friday.

One of the officials said there were no explicit threats written on the list that was found on the body of James T. Hodgkinson, who was killed on Wednesday morning in a shootout with the police in Alexandria, Va., after he took aim at Republican lawmakers preparing for a charity baseball game against congressional Democrats.

Image Representative Jeff Duncan, a South Carolina Republican, is said to have been on a list carried by the gunman. Credit... Mark Wilson/Getty Images

The official said the list included at least three names: Representatives Mo Brooks of Alabama, Jeff Duncan of South Carolina and Trent Franks of Arizona, according to the two officials who spoke on condition of anonymity because the shooting remained under investigation.