With their country in deep political crisis, Czechs will take to the streets throughout the country on Tuesday to commemorate the 20th anniversary of the end of decades of repressive communist rule.

Senior US and Czech defence officials held talks on Friday to discuss ways for the Czech Republic to participate in a reworked US missile defence plan.

Czech President Vaclav Klaus on Tuesday became the European Union's final leader to sign a bitterly contested Lisbon reform treaty into law after the country's top court said it did not conflict with the constitution.

The Czech Republic's top court opened a hearing on Tuesday to assess the compliance of the European Union's Lisbon treaty with the country's constitution following a complaint filed by eurosceptic senators.

The European Union's Lisbon treaty looked set to emerge from a limbo as the last hurdle to its ratification, Czech President Vaclav Klaus, accepted a concession offered by the 27-nation bloc.