28 January 2011 Last updated at 07:09 ET
A US consular employee has appeared in court charged with the murder of two motorcyclists who were shot dead in the Pakistani city of Lahore.
Raymond Davis told the court he had fired his gun in self-defence.
Another person was run over and killed by a vehicle carrying Mr Davis's colleagues as they came to his aid, police and witnesses have said.
The man involved in the shooting was a consular official, said the US embassy in Islamabad. It did not give his role.
"The US embassy is working with Pakistani authorities to determine the facts," it said in a statement.
Lahore's police chief, Aslam Tareen, told the BBC Mr Davis was employed on "security duties" in the consulate.
He did not have diplomatic immunity and was not one of the foreign security personnel allowed to carry firearms, according to the Pakistani authorities.
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