TU-16 Crash in Norway (Svalbard Island)

Any one have any info on the TU-16 that crashed into a mountain on Svalbard in the 1970’s? Reading a book on Nordic air defense for a class and came across it. Seems the balck box was recovered by the Norwegians and never returned to the Soviets. At the time of the books publication no info on the information on the black box has been released. Any other info out there? Info, stories, pics of Soviet intrustion into Norwegian, Swedish and maybe Finnish (had a quasi-agreement with Soviets) would also be great!