Two people have been killed as a result of a US drone missile attack in the tribal region of North Waziristan bordering Afghanistan.

Pakistani intelligence officials confirmed the casualty on early Thursday strike. However, the exact location of the attack has not yet been announced.

The news comes as the United Nations warns Washington about indiscriminate use of drone strikes in Pakistan and Afghanistan, saying that it may be breaking humanitarian law.

Earlier on Wednesday, the UN rights investigator said the US has done nothing to demonstrate that its not randomly killing civilians in violation of international law by the use of drones.

According to independent reports, since August 2008 alone, around 70 cross-border predator strikes carried out by American drones have resulted in the death of 687 Pakistani civilians.