<p>At least three US troops were wounded today when an Afghan soldier opened fire at them at a military base in northern Afghanistan, the defence ministry said, in an apparent insider attack.<br /><br />The so-called "green-on-blue" attack at Camp Shaheen close to Mazar-i-Sharif city is the latest in a string of incidents where Afghan soldiers have turned their weapons on international forces training them.</p>.<p><br />It comes as the United States is expected to send more troops into the lengthy conflict at a time when the Taliban are ramping up their campaign against the Western-backed government.</p>.<p><br />"Initial information shows three US soldiers visiting the base were wounded," ministry spokesman Mohammad Radmanish told AFP, adding that the attacker had been gunned down.</p>.<p><br />US-led NATO forces confirmed that American soldiers had been wounded in "an incident" at Camp Shaheen, without specifying a number.</p>.<p><br />"At this time we can confirm there are no US or NATO Resolute Support fatalities," the international coalition said in a brief statement.</p>.<p><br />"US soldiers have been wounded. One Afghan soldier was killed and one was wounded in the incident."<br />Green-on-blue attacks have been a major problem during NATO's long years fighting alongside Afghan forces.</p>.<p><br />Western officials say most insider attacks stem from personal grudges and cultural misunderstandings rather than insurgent plots.</p>
<p>At least three US troops were wounded today when an Afghan soldier opened fire at them at a military base in northern Afghanistan, the defence ministry said, in an apparent insider attack.<br /><br />The so-called "green-on-blue" attack at Camp Shaheen close to Mazar-i-Sharif city is the latest in a string of incidents where Afghan soldiers have turned their weapons on international forces training them.</p>.<p><br />It comes as the United States is expected to send more troops into the lengthy conflict at a time when the Taliban are ramping up their campaign against the Western-backed government.</p>.<p><br />"Initial information shows three US soldiers visiting the base were wounded," ministry spokesman Mohammad Radmanish told AFP, adding that the attacker had been gunned down.</p>.<p><br />US-led NATO forces confirmed that American soldiers had been wounded in "an incident" at Camp Shaheen, without specifying a number.</p>.<p><br />"At this time we can confirm there are no US or NATO Resolute Support fatalities," the international coalition said in a brief statement.</p>.<p><br />"US soldiers have been wounded. One Afghan soldier was killed and one was wounded in the incident."<br />Green-on-blue attacks have been a major problem during NATO's long years fighting alongside Afghan forces.</p>.<p><br />Western officials say most insider attacks stem from personal grudges and cultural misunderstandings rather than insurgent plots.</p>