Around dusk on 9 June, Lieutenant-Colonel Soria's men detected the presence of British troops who had taken up positions in Port Harriet House on the southern approaches to Mount Harriet. The 4th Regiment's Reconnaissance Platoon, under Sub-Lieutenant Jorge Pasolli, received orders to move forward and clear the British from the House and the Scots Guards Reconnaissance Platoon that had moved into the area was forced to withdraw when the Argentines radioed fire support from the 120-mm Mortar Platoon dug in on Mount Harriet. Sub-Lieutenant Pasolli's men attacked and the Scots Guards returned fire with two Bren machine guns but were forced to abandon their rucksacks and radios. As the Guardsmen retreated, under small arms and mortar fire, they sustained three wounded, including Sergeant Ian Allum.