Washington (Agencies): In his first public remark on the case of Raymond Davis, US President Barack Obama has asked Pakistan to treat him as a diplomat and release him.

Expressing concern about the loss of Pakistani lives in the fatal incident, the US President also asked Pakistan not to prosecute Davis and treat him as a diplomat, the Dawn News reported on Wednesday.

Obama noted that the Vienna Convention for diplomatic immunity granted Davis some rights, the report added.

"We expect Pakistan to abide by the same convention," he said adding, "We're going to be continuing to work with the Pakistani government to get this person released."

Davis, an official with the US diplomatic mission in Lahore, has been in judicial custody. He was detained on January 27 for killing two men on a street in Lahore, the capital of Punjab province. Davis claimed to have acted on self-defence, thinking the two men to be robbers.

Meanwhile, Pakistani officials would present documents to the Lahore High Court conveying the stand of legal experts who believe that the detained American has diplomatic immunity, but will leave it to a judge to fix on his status.

US State Department spokesman Philip J Crowley said the US government would file a petition for Davis' release on Thursday and would provide proof in the Lahore High Court to show that he was entitled to diplomatic immunity.

"We are building a strategic partnership with Pakistan. We are going to build this relationship for the long term," Crowley said on reports of bitter relationship between the two countries.

Subsequently, US has not proposed any slashing of aid to Islamabad, and for the second year in running has allocated a whopping $3.1 billion as help to the country for 2012.

The huge allocation a $1.1 billion is to provide critical equipment and training for Pakistani forces, raising the capacity of Pakistani government to curb insurgents inside that country and eliminating the insurgent's capacity to conduct cross-border operations in Afghanistan.