WASHINGTON (Agencies) - US sources in Washington closely following the case said on Monday Davis was a protective officer employed as a CIA contractor. Davis duties were essentially as a bodyguard, to provide physical security to US Embassy and consular officers and visiting American dignitaries, US officials who declined to be identified told Reuters. Officials strongly denied news reports alleging Davis was part of a covert CIA-led team of operatives conducting surveillance on militant groups. Two US sources familiar with the matter confirmed to Reuters that Davis, worked previously on contract as a security officer for Xe Services, a controversial private contractor formerly known as Blackwater. A US official said that America was trying to work out a diplomatic solution to the disagreement but noted it could take the matter to the International Court of Justice. Asked during a conference call with reporters about a link between Davis and the CIA, State Department spokesman PJ Crowley said: We will not comment on his particular activity in Pakistan other than to say he is a member of the administrative and technical staff of the embassy and has diplomatic immunity. From that point ... he enjoyed privileges and immunities against local criminal law, including inviolability of person, inviolability from arrest and detention, and immunity from criminal jurisdiction, another senior US official said. Crowley said the United States was not considering curtailing economic or military assistance to Pakistan to show its displeasure over Davis treatment.