Sweden issued cyber attack alert as its air traffic reeled

  Sweden suspects a hacker group linked to Russian intelligence was responsible for an attack on its air traffic control systems last November, it is claimed.

Air traffic control systems across much of Sweden were unavailable on November 4. Computer problems meant air traffic controllers were unable to use their displays, an issue that prompted the cancellation of multiple domestic and international flights. Arlanda, Landvetter and Bromma airports were particularly affected.

  Sweden's air traffic control systems problems reportedly coincided with Russian electronic warfare activity in the Baltic Sea region, which may have included jamming of air traffic communication channels. The signals reportedly emanated from the Russian enclave of Kaliningrad, south of Lithuania.

  LFV, Sweden's civil aviation administration, said its investigation into the November problems remains open. It declined to respond to the theory that a cyber attack might have been behind problems with the country's air traffic control system last year.