Russia on Wednesday said it had destroyed a depot of foreign arms near the city of Lviv, in a rare strike on western Ukraine.
"Air-launched high-precision long-range missiles near the city of Radekhiv in Lviv region destroyed a storage base with foreign-made weapons and ammunition delivered to the Kyiv regime from Poland," the defence ministry said in a statement.
The statement did not specify what types of weapons were destroyed in the attack on Radekhiv, some 60 kilometres (37 miles) northeast of the regional capital Lviv.
The ministry said it also destroyed four warehouses containing rockets, artillery weapons and ammunition in the southern region of Mykolaiv and the eastern region of Donetsk.
President Vladimir Putin sent troops into Ukraine on February 24, sparking a conflict that has killed thousands, displaced millions and fulled fears of a global food crisis over blocked grain exports.
After abandoning efforts to take Ukraine's capital Kyiv, Russian troops have instead focused on capturing the eastern region of Donbas.
In recent weeks the Ukrainian army, bolstered by deliveries of Western-supplied long-range artillery, has sought to stage a counter-offensive to retake the southern region of Kherson.