The networks used by the Estonian government were apparently harassed by unknown foreign intruders using a denial of service attack. This followed the country’s disagreement with neighbouring Russia over a war memorial being removed.
Online banking and many government online services were disrupted temporarily. These particular attacks could be considered more like cyber-based riots than actual damaging attacks. Estonia responded quickly and had relaunched many of its services within hours of the attacks, with others coming back online in a few days.