Criminal and forensics investigators are rushing to document evidence of executions and torture on the part of Russian troops, digging up bodies and coaxing traumatized witnesses to come forward.

Since the war began, Poland has been aiding Ukraine and millions of its refugees. But after a recent missile strike, the country is feeling vulnerable.

Move comes the same day United Nations announce Russia and Ukraine brokered a deal to extend grain agreement ahead of its expiration Saturday.

The NATO chief and the president of Poland both say there are no indications a missile that came down in Polish farmland, killing 2 people, was a deliberate attack.

Authorities are to start investigating reports from Kherson residents that Russian forces set up at least three alleged torture sites in now-liberated parts of the wider Kherson region.