Syria completed the final phase of its withdrawal Sunday, with a symbolic presence to remain until Tuesday, when a ceremony will be held to bid farewell to the heads of Syrian intelligence here. On customary condition of anonymity, Lebanese security sources confirmed "the big bulk of the Syrian forces, including heavy weapons and equipment," had left Lebanon by Sunday evening. The sources added the farewell celebration will be held at the Riyak military base in the Bekaa Valley, a few kilometers from the Syrian border. The few remaining Syrian troops and officials are then expected to pull back across the border after the ceremony, marking the final chapter of Syria's military and intelligence presence in Lebanon. Incoming reports from eyewitnesses Sunday said that, during their departure, Syrian soldiers at a base outside the Bekaa village of Deir al-Ahmar were seen filling ditches surrounding the camp with sand and rubble, burning documents and dismantling the base's structures. Over the weekend, Syrian military units vacated at least 10 positions in the northern part of the Bekaa.