The US Commerce Department launched investigations into imports of drones, parts for unmanned aerial vehicles and for polysilicon, a key material for solar power, setting the stage for possible tariffs on those goods.

Russia launched four missiles and 136 drones into Ukraine overnight into Monday morning, according to Ukraine's air force, after President Donald Trump said the U.S. would provide Kyiv with more Patriot surface-to-air systems to help defend against Russia's nightly bombardments.