At least 60 Ukrainian drones targeting the Russian capital were shot down in a massive attack on Tuesday morning, Moscow Mayor Sergei Sobyanin said. At least 11 of the drones were shot down in the Ramensky and Domodedovo districts of the Moscow region surrounding the Russian capital,

Russia said it was hit by a “massive” drone attack overnight Tuesday, hours ahead of critical talks between officials from Washington and Kyiv.

Massive drone strikes on Moscow left a trail of destruction in residential areas in Ukraine’s largest ever attack on the city according to local officials. The attacks come as the U.S. and Ukraine delegations are engaged in pivotal negotiations in Saudi Arabia over a possible minerals deal in exchange for security guarantees.