Police in Pakistan have confirmed the arrest of the son-in-law of disgraced nuclear scientist AQ Khan for allegedly assaulting two British diplomats.
Pakistan pardoned AQ Khan, despite his dramatic revelations
Saad Ali Khan was arrested on Monday after a complaint by the diplomats.
The UK High Commission in Islamabad said the two victims, a man and a woman, required medical treatment after the "vicious and unprovoked" attack.
AQ Khan admitted last year that he had leaked nuclear secrets to North Korea, Libya and Iran.
A former national hero, he has been under virtual house arrest since February 2004.
Police in Islamabad say however that the incident was a minor scuffle and "should not be blown out of proportion".
They also denied reports that several men attacked the British diplomats.
"Saad Ali Khan was alone in his car," Safeer Bhatti, head of the Kohsar police station said.
The incident is said to have taken place in an area close to the scientist's house in a secure area where many diplomats and officials live.
Selling 'nuclear secrets'
Mr Khan returned to Pakistan in 1976 to set up the country's nuclear weapons programme.
He has been confined to his home since his public confession early last year that he illegally transferred nuclear technology to countries including North Korea, Libya and Iran.
He was given a pardon by President Musharraf because of his services to the nation's nuclear industry.
The government has always denied any involvement in the leaking of the technology.
This year it confirmed Dr Khan had supplied nuclear centrifuges - which can be used to enrich uranium for nuclear weapons - to Iran.
Dr Khan has not been allowed to receive visitors and international investigators probing global nuclear proliferation have not been allowed to question him.
President Musharraf has said the discovery of the Khan network was the most embarrassing episode in his political career.