Three law enforcement officers have been fatally shot and five others were wounded while serving a warrant in Charlotte, North Carolina, officials say.
At least one suspected attacker was found dead in the front yard of a barricaded home after a standoff that lasted three hours, police said.
Authorities said two shooters were involved in the attack.
The injured officers were part of a US Marshals Service-led task force.
They were attempting to serve a warrant for a felon wanted for possessing a firearm when gunfire erupted on the suburban street.
The officers returned fire at an assailant in the front yard, then more shots were fired at them from inside the home, Charlotte-Mecklenburg Police Chief Johnny Jennings told a news conference.