Norway's highest court has upheld guilty convictions against two men involved in a 2010 al-Qaeda plot to attack a Danish newspaper that caricatured the Prophet Muhammad.

Last year, a local court sentenced Mikael Davud to seven years in prison and co-defendant Shawan Sadek Saeed Bujak to three and a half years.

A third defendant was acquitted of terrorism charges but convicted of helping the others acquire explosives.

Investigators say the plot was linked to the same al-Qaeda planners behind thwarted attacks against the New York subway system and a shopping centre in Manchester, England, in 2009.

Norwegian investigators, who worked with their US counterparts, said the men had been building a bomb in an Oslo basement.

Source: AP