A 2007 photograph taken at the scene of the al-Qaeda attacks in Wah Photo: 2008 AFP
The allegations, by a leading British expert on Pakistan's nuclear arsenal, increased fears that terrorists could acquire a nuclear device or could trigger a nuclear disaster by bombing an atomic facility.
In a paper for the respected anti-terrorism journal of America's West Point Military Academy, Professor Shaun Gregory, director of the Pakistan Security Research Unit at Bradford University, detailed three attacks since November 2007 and raised the spectre of more incidents in the future.