Wait until your target collects the intel. He will start walking around the map. Follow him until he arrives at a fountain. On one wall is scaffolding with a rock on top. Wait until your shot is covered, then aim for the explosive barrel at the bottom of the scaffolding. The construction will collapse and bury your target. If you get spotted and he stops walking (and will not continue after your hide), try to attract him to the location step by step by throwing stones.