UKRAINIAN Prime Minister Arseny Yatseniuk has warned of possible attempts by Russia to disrupt Sunday's parliamentary election in Ukraine and ordered a full security mobilisation to prevent terrorist acts being carried out.

He said: "It is clear attempts to destabilise the situation will continue and be provoked by the Russian side. They did not succeed during the presidential election (in May) but their plans have remained.

"We need full mobilisation of the whole law-enforcement system to prevent violations of the election process and any attempts at terrorist acts during the elections."

Mr Yatseniuk's warning was likely to heighten tension before Sunday's poll, the first parliamentary election since the street protests last winter which drove Moscow-backed leader Viktor Yanukovich to flee to Russia.

Western governments supported the pro-Europe protests but Russia denounced Mr Yanukovich's overthrow as a coup. It went on to annex Crimea and back armed revolts by separatists in eastern Ukraine, in a conflict that has killed more than 3,700 people.

Mr Yatseniuk added: "Realistically, we are in a state of Russian aggression and we have before us one more challenge - to hold parliamentary elections. The choice (of voters) will be made by the ballot-paper and an honest expression of will and not automatic weapons."

Interior Minister Arsen Avakov said 61,000 police would be responsible for guarding polling stations across the country of 46 million. Of those, 4,000 will be members of special forces who can react rapidly to any terror threat.

A political bloc supporting Ukraine's pro-Western president Petro Poroshenko is expected to emerge as the leading force in parliament. That should provide him with a mandate to press ahead with a peace plan for eastern Ukraine while pursuing the European integration that has riled Moscow.