Lebanese security forces on Monday arrested the suspected killer of a woman employed at the British embassy in Beirut and whose body was found dumped on the side of an expressway at the weekend, an official said. "Its correct," the senior security official told AFP when asked about reports that the suspected killer of Rebecca Dykes had been detained. The official would not provide further details on his identity, only adding that the investigation had established Dykes killing "was not politically motivated". Police sources told the BBC and Lebanese media that the suspect worked as a taxi driver. Police traced his car through surveillance cameras on the highway, Lebanon’s state-run National News Agency reported. The young woman was found dead with a piece of string tied around her neck, the official had said on Sunday. Another official had said investigators were looking into reports she had been sexually assaulted. It is thought Dykes had spent Friday evening at a going-away party for a colleague in the popular Gemmayzeh district of Beirut, the BBC said. After leaving the bar at about midnight it appears she was abducted by the taxi driver. Dykes worked at the Department for International Development (DFID) in Beirut. Her family, the UK ambassador and DFID issued statements on Sunday expressing their shock but providing no further information.