<p>The US Embassy in Kabul said in a security alert on Sunday that the security situation in the Afghan capital was changing quickly, including at the airport, where there were reports of gunfire as US troops aid an evacuation of most US personnel.</p>.<p>"There are reports of the airport taking fire; therefore we are instructing US citizens to shelter in place," the embassy said.</p>
<p>The US Embassy in Kabul said in a security alert on Sunday that the security situation in the Afghan capital was changing quickly, including at the airport, where there were reports of gunfire as US troops aid an evacuation of most US personnel.</p>.<p>"There are reports of the airport taking fire; therefore we are instructing US citizens to shelter in place," the embassy said.</p>