(CNN) -- Two Afghan police officers were killed in a friendly fire incident in the northeast part of the country, the U.S.-led coalition said Sunday.
A joint Afghan-coalition was conducting an operation in the Kapisa province against a Taliban leader when the police fired on them, the coalition said in a statement.
The troops tried to identify themselves as a friendly force, including having an interpreter speak to the officers in Pashtu, the main local language, the statement said.
"The ANP (Afghan National Police) were undeterred and fired on the patrol," the coalition said. "In self-defense, the patrol returned fire killing two individuals."
Meanwhile, a coalition soldier was killed and two wounded in a roadside bomb in eastern Afghanistan Sunday.
The NATO-led International Security Assistance Force did not release additional information about the incident.