In western Herat province, US special forces and Afghan troops clashed with fighters disguised as police officers manning a checkpoint, leaving three suspected militants dead, the coalition said on Thursday. The men, wearing fake police uniforms, opened fire on the troops as they approached the illegal checkpoint in Shindand district on Wednesday, the coalition said in a statement. The patrol returned fire, killing three and wounding another three, it said. Troops have confiscated more than 100 fake uniforms and more than a dozen false identification documents in Herat province since Tuesday, the coalition said.