Western Leaders On High Alert After Explosion In Poland That Killed 2

Ukraine's top leaders accuse Russia of carrying out the attack,

as leaders in the United States and Europe remain cautious.

World leaders on three continents scrambled for answers

for hours after reports on Tuesday that a missile attack 

near Poland's border with Ukraine killed two people, 

an incident that has become one of the most horrific 

vPresident Joe Biden, who is in Indonesia for the G-20, and National 

During their call, Biden "offered full US support and assistance to Poland's investigation" a

Security Adviser Jake Sullivan made urgent phone calls with their Polish counterparts

moments in history. Can About nine months of war.