Authorities in St. Petersburg advised residents to remain indoors on Saturday after a large Ukrainian drone attack targeted Russia’s second-largest city, according to reports.

The incident came a day after Russian President Vladimir Putin rejected Ukrainian President Volodymyr Zelenskyy’s proposal for direct, face-to-face talks, saying he did not see a reason for them.

Recent reporting has also described an increase in Ukraine’s long-range strikes on energy and military facilities inside Russia, including targets reported to be up to about 1,000 kilometers from the border.