Pakistan's government has frozen the accounts of two nuclear scientists suspected of links with Osama bin Laden.

The United Nations Security Council has ordered a global freeze on the assets of a Pakistani organisation, two former nuclear scientists and a Pakistani industrialist suspected of links to Osama bin Laden.

Two retired Pakistani nuclear scientists, suspected of having links with Osama bin Laden have been detained again for questioning.

There are claims Osama bin Laden met with two retired nuclear scientists, who were recently arrested and questioned over their work in Afghanistan.

Pakistan's government is denying reports the CIA and FBI are questioning three of its nuclear scientists.