German authorities were Wednesday investigating two attacks on electricity substations in different parts of the country, the latest suspected sabotage targeting critical infrastructure.

Improvised explosive devices were used on Sept. 1 in a sabotage attack near a coal-fired power plant in Germany, with several electricity lines damaged and supply briefly…

Improvised explosive devices were used Tuesday in a sabotage attack near a coal-fired power plant in Germany, with several electricity lines damaged and supply briefly…