WASHINGTON (AP) - Congress is poised to launch an investigation into why Army leaders have resisted requests to provide battlefield units with a specific computer program that helps troops locate and clear roadside bombs.

The software program, the Palantir System, is being used by some units in Afghanistan, but Army officials have denied multiple requests for it from others, including a May memo from the 1st Brigade, 82nd Airborne Division, that cited an "urgent need" for it in the volatile eastern province of Ghazni.

Rep. Duncan Hunter, a member of the House Armed Services Committee, has asked the House Committee on Oversight and Government Reform to investigate the matter.

Army officials said they also have begun an investigation.

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