Kyiv is searching for ways to strengthen its defences against Moscow's two-year-old invasion, including by boosting domestic arms production and innovation.

Oleksandr Kamyshin said during a televised conference in Kyiv that 100 state and 400 private companies were involved the effort, and that Ukraine this year plans "to considerably increase ammunition production."

In a separate address, Ukraine's digital minister, Mykhailo Fedorov, said 90% of the drones used on the battlefield against Russian forces were produced in Ukraine.

Ukraine's interior minister, Ihor Klymenko, said during the conference that not a single weapon had crossed the border from Ukraine into the European Union during two years of Russia's full-scale invasion.

(Reporting by Olena Harmash; Editing by Hugh Lawson and Bernadette Baum)