Maulvi Faqir Mohammad, a former deputy leader of the Tehrik-i-Taliban Pakistan, was seized in a commando night operation in eastern Afghanistan, security officials said. Islamabad has not confirmed the arrest.
His capture came a fortnight after military and political leaders from Afghanistan and Pakistan met at Chequers to try to overcome years of mistrust.
Sandy Hook killer 'inspired by Breivik'
Adam Lanza, the US teenager who murdered 26 people at Sandy Hook primary school last year, was motivated by a desire to kill more people than Anders Breivik, the Norwegian mass murderer, according to a report.
Police sources briefed on the Connecticut inquiry told CBS that Lanza wanted to exceed Breivik's 77 kills and saw the school as the "easiest target", while video games also helped motivate him to murder. Lanza killed himself when police arrived at the school.
German Eurovision song controversy
The song that will represent Germany at the Eurovision Song Contest this year is being investigated after claims that it is a copy of last year's winner.
NDR, Germany's national broadcaster, is investigating whether Glorious by the group Cascada is too similar to Euphoria, by the Swede, Loreen. Cascada deny the claims.