"About 100 people alternately blocked the seven border posts between Austria and the Czech Republic for an hour in the morning," Roland Egger, spokesman for the 'Atomstopp' group said.

The organisation is calling for the closure of the Soviet-designed Temelin plant, about 40 kilometres (25 miles) from the Austrian-Czech border, where a number of leaks have occurred.

Austrian anti-nuclear demonstrators who regularly stage border blockades have threatened to bolster their movement if no progress is made in talks between Prague and Vienna.

Atomstopp wants Vienna to take the case against Prague to an international court, after the Austrian parliament agreed a resolution on the matter in a vote in December.

Anti-nuclear protestors have also called on an Austrian regional governor to address the issue of safety at Temelin during his talks Wednesday with a Czech regional official.

Austrian Environment Minister Josef Proell also said Wednesday that he was awaiting legal reports on Temelin before deciding whether to lodge a case of violation of international public law.

Last month, the head of the Czech Republic's nuclear power watchdog said the frequency of leaks at the Temelin power plant was "unacceptable" after the leak of about 1,000 litres of mildly radioactive water, which had followed a similar incident a week earlier.

Austria banned the use of nuclear energy in its constitution after a referendum in 1978.

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