<p><a href="/en/afganistan/kabul" class="glossify-link">KABUL</a> suggested a joint investigation would be conducted to determine the details of friendly fire incident, in Kunduz province.</p>
<p>A US forces air strike have killed a number of Afghan security personnel during an airstrike in northern Kunduz province. local officials said yesterday.</p>
<p>A US military spokesman said on Wednesday the raid was called in self0defence after contingent American and Afghan troops came under fire from another group of Afghan security forces.</p>
<p>Army Col. David Butler told Task & Purpose the joint force was attacked during a combined patrol. Air support was requested to counter the machine gun fire.</p>
<p>He said the machine gun fire was coming from another group of Afghan security forces, according to Butler, who said an unspecified number of Afghan security personnel were killed.</p>
<p>He added American troops escaped unhurt in the incident. He suggested a joint investigation would be conducted to determine the details of the incident.</p>
<p>"This operation was extensively planned and coordinated with US and Afghan security forces to prevent an event like this from occurring," Butler said. "We regret the tragic loss of our Afghan partners."</p>
<p>Less than a month ago, 18 Afghan police officers were killed in American airstrikes in southern Helmand province.</p>
<p><a href="/en/pan" class="glossify-link">PAN</a> Monitor/mud</p>
