MEP Maria Walsh says the party has shown its true colours and that its stance is not good enough.
A Midlands MEP is strongly criticising Sinn Fein for abstaining from and voting against a resolution on Ukraine in the European Parliament.
The vote increased EU responsibility for Ukrainian security.
It also called on Russian sovereign assets to be confiscated and used for Ukraine to rebuild its defence.
Sinn Feín MEPs Lynn Boylan and Kathleen Funchion abstained from the vote while MEP Michael McNamara voted against it - the resolution passed on a majority of 442 votes.
MEP Maria Walsh says the party has shown its true colours and that its stance is not good enough:
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