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© UnknownPeople look at the blood stains in a Lahore street after the American consular killed two Pakistanis on January 27, 2011.
Pakistani media say the US embassy official charged with the murder of two Pakistani citizens is an agent for the notorious security firm, Blackwater.

The US official identified by police as Raymond Davis shot dead two men riding on a motorcycle in Lahore on Thursday in what he claimed was self-defense during an attempted robbery.

A third Pakistani was run over and killed in the incident after being hit by a US consulate vehicle rushing to the scene to the American's aid.

The US embassy in Islamabad has confirmed the man involved was a consular official and says it is carrying out an investigation.

Trying to avoid an anti-American reaction, US State Department spokesman Philip Crowley said Thursday that Washington will fully cooperate with Pakistani authorities and will explain about the incident to the Pakistani people.

The issue of American diplomats carrying weapons inside Pakistan was a hot-button subject last year among certain politicians and sections of the media purportedly worried about the country's sovereignty.

Many Pakistanis regard the United States with suspicion or outright enmity because of its occupation of neighboring Afghanistan