Two exit polls indicate that Ukrainian president Petro Poroshenko's party will secure a narrow win in today's parliamentary election, falling substantially short of an outright majority.

The Rating Group Ukraine exit poll said the Poroshenko Bloc won 22.2 per cent of the votes and that prime minister Arseniy Yatsenyuk's Popular Front party came second at 21.8 per cent.

Another exit poll organised by a group of three Ukrainian research groups saw the Poroshenko Bloc with 23 per cent of the vote and Popular Front in second place at 21.3 per cent.

Although they lead rival parties, Mr Poroshenko and Mr Yatsenyuk share pro-Western postures and have campaigned on reform agendas aimed pulling Ukraine back from the brink of economic ruin.

Preliminary official results are expected tomorrow.

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