The death toll in Saturday's gun rampage in West Texas rose to seven on Sunday, local media reported, and police said they would hold a news conference later in the day.
Police had earlier said five people, including the gunman, were killed in the mass shooting that began with a traffic stop and ended when the shooter was cornered by officers in the parking lot of a cinema complex in Odessa, Texas.
Authorities have not named the victims or the gunman, but said on Saturday that he was a white male in his 30s who was known to police. Twenty-one people were wounded.
The rampage between the cities of Midland and Odessa started on Saturday afternoon when state troopers pulled over a car on Interstate 20 and the lone occupant fired at their patrol vehicle with a rifle, wounding one of the troopers.
After fleeing the scene, the suspect hijacked a postal van and opened fire on police officers, motorists and shoppers on a busy Labor Day holiday weekend before being shot dead outside the Cinergy cinema complex in Odessa, police said.
Odessa Police Chief Michael Gerke said at a news conference on Saturday that the suspect was known to him, but he declined to comment on a motive for the shootings.
(Reporting by Andrea Shalal in Washington and Keith Coffman in Denver; Writing by Daniel Wallis; Editing by Nick Zieminski)