In the same week, computer systems at European airlines and Saudi airports were disrupted, and Iran targeted ship-navigation systems on an island belonging to Oman.
The term "hybrid warfare" describes using sabotage, cyberattacks and other covert pressure instead of open combat.
Ohio's state auditor, the office that checks how public money is spent, is investigating a cyberattack that may involve foreign hackers.
Britain's defence secretary set a deadline for the country to be ready to fight a war, told households to stockpile emergency supplies, and brought in Finnish trainers to teach officials how to counter hybrid warfare.
After protests in Milan and a week of unrest in Albania, both governments said foreign powers had orchestrated the demonstrations, a term usually used for covert campaigns like cyberattacks or disinformation.
In the same week, Italy warned that Russia's campaign of sabotage and disruption against Europe is becoming more dangerous, the European Union's defence chief called for a strong response, and a report described Russia running a messaging campaign to win support from developing nations.
Germany, Italy, Austria, Poland, Portugal and Spain want EU finance ministers to discuss a new tax on oil companies at a meeting in Dublin next month.
Italy's deputy prime minister Matteo Salvini says Italy will not take back asylum seekers who first entered the EU through Italy but are now in Germany, even though EU rules say they should be sent back to the first country they entered.
Sweden is joining Germany, Switzerland, Austria and Finland in sending migrants back to Italy, the country where they first entered the European Union, using an EU rule called the Dublin Regulation.
The European Union limits how much extra debt member countries can take on each year.
This week, officials in Germany, Italy, Australia, India and Iran each said their country was already under attack, calling it 'hybrid war' rather than war — a mix of drone incursions, cut undersea cables and cyberattacks that stops short of open warfare.
A new Italian study finds Russian, Chinese and Iranian influence campaigns running side by side against Italy's institutions, each exploiting the same openings.