Russia’s Defence Ministry says as many as 337 drones were launched by Kyiv over Monday night, with 91 of them targeting the Moscow region. The attack, possibly the largest by Ukraine since the start of the war, sparked fires across Moscow, and forced the suspension of train and air travel. Russia’s Investigative Committee has reportedly opened a terrorism case in response to the massive drone attack. The strike on the Russian capital, hundreds of kilometres from the Ukraine border, came ahead of Ukrainian President Volodymyr Zelensky’s meeting with America’s top diplomat Marco Rubio in Saudi Arabia. The talks will be the most senior since a disastrous White House meeting last month, when Trump berated Ukraine’s President for purported ingratitude. Washington has suspended military aid to Ukraine as well as intelligence sharing and access to satellite imagery in a bid to force it to the negotiating table. The war, the biggest in Europe since World War Two, has combined grinding World War One style attrition trench and artillery warfare with the major innovation of drones. Moscow and Kyiv have both sought to buy and develop new drones, deploy them in innovative ways, and seek new ways to destroy them – from using farmers’ shotguns to electronic jamming systems.