Islamabad, Oct.28 US Secretary of State Hillary Clinton, who arrived here on a three-day visit early on Wednesday, has urged Pakistan to realise the threat facing the country's nuclear armaments, adding hat Washington was still worried about nuke proliferation.

Interacting with media persons travelling with her, Clinton said banned organisations such as Al-Qaeda are always on the look out for acquiring the nuclear know-how's and raw materials with an aim to expand their reign of terror.

"We know Al-Qaeda and their related extremist allies are always on the hunt for nuclear material and it doesn't have to be a lot to create a very damaging explosion with extraordinary psychological and political ramifications," The Dawn quoted Clinton, as saying.

Clinton said Islamabad must understand the seriousness of the issue and the severity of the threat facing the country's nukes.

"It's not just about what might happen in our country or in Europe. It's what could happen in Pakistan and what the impact of that would be. We want them also to imagine what that threat would be with a nuclear weaponised terrorist group in their midst," she said.

Clinton noted that Pakistan's atomic arsenal was currently safe, but added that proliferation still remains a cause of worry for Washington.

"We worry about proliferation and we have good reason to worry about proliferation. We want them to work with us on the Fissile Material Cutoff Treaty. We want them to really understand how serious a threat we face," she said. (ANI)