NATO chief says Poland blast likely caused by Ukrainian missile — but not Ukraine's fault- The military alliance's secretary-general, Jens Stoltenberg, said the missile incident took place "as Russia launched a massive wave of rocket attacks across Ukraine."The military alliance's secretary-general, Jens Stoltenberg, said the missile incident took place "as Russia launched a massive wave of rocket attacks across Ukraine."Preliminary analysis, as previously reported, suggests the incident was caused by a Ukrainian air defense missile fired to "defend Ukrainian territory against Russian cruise missile attacks."Ukraine's Defense Ministry responded cautiously to reports suggesting its own armed forces fired the missile that hit Poland, saying it wanted to see the evidence that NATO's assessment was based upon.Danilov said on Twitter that Ukraine was "ready to hand over the evidence of the Russian trail that we have" but Kyiv was still awaiting "information from our partners, on the basis of which a conclusion was made that it is a Ukrainian air defense missile.""