Pakistan President Pervez Musharraf said European nuclear scientists should also be investigated, along with the Pakistanis, as they may have sold secrets abroad for "personal gain."
Pakistan is investigating if some people in the government knew about possible security leaks, he told reporters on the sidelines of the World Economic Forum in Devos Saturday.
He said those who might have leaked nuclear secrets were "anti-state elements" who acted against government policy.
"We are carrying out an in depth investigation and... We will sort out everyone involved," he promised.
Musharraf said the Pakistan started a covert programme to develop a nuclear weapon about 30 years ago, after India conducted nuclear tests in Pokhran in 1974. He said scientists were given full freedom to develop the technology.
"It could succeed only if there was total autonomy and secrecy," he said.
"If there was some individuals selling national assets for personal gain it was possible because it was not open, it was not under strategic check and controls," he said.
The investigation began after Iran disclosed the names of some Pakistan scientists who provided them with nuclear technology, Musharraf said.
But he said he wanted some European countries and scientists investigated as well. He said European countries had the sophisticated metallurgy to produce fissile materials.
"There are European countries involved in refining and producing. It is high-class metallurgy. So why is no one talking about it?" he asked.
While not ruling out Pakistani government involvement in proliferation, he said it was more likely that individuals were involved.
He said the country's nuclear weapons were now under strict government control and that there was no possibility they could be seized by terrorists even if he was killed.
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