The Polish President Andrzej Duda says the missile that hit Poland is likely an "accident" from Ukrainian air defences.
Two people were killed yesterday after a missile landed in eastern Poland near the Ukrainian border following a wave of Russian strikes across Ukraine.
NATO head Jens Stoltenberg has backed up the President Duda saying it is unlikely to have been a direct attack by Russia.
There have been fears that the strike on Poland was a deliberate hit by Russia and would escalate the war.
BBC correspondent James Waterhouse spoke to Morning Report from Mykolyaiv.