He was meeting with political leaders in Lviv.
A Fianna Fáil MEP who travelled to Ukraine yesterday says the queues of people trying to leave the country was "catastrophic" to witness.
Billy Kelleher and his party colleague Senator Timmy Dooley met with political leaders in Lviv, after they were invited to visit by Ukrainian politicians.
They've now crossed back to the Polish side of the border.
Billy Kelleher says more access routes out of Ukraine need to be opened up:
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