* Polish and Czech bonds attract robust demand
* Polish bond yields down, Czech yields up after tenders
(Adds topup, finance ministry official, Czech tender)
By Dagmara Leszkowicz
WARSAW, Feb 10 (Reuters) - Poland sold all 2-year bonds on offer at primary and supplementary tenders and the Czech Republic placed 3.5 billion crowns of 15-year bonds on Wednesday, both attracting robust demand that helped to ease concerns over emerging Europe's debt woes.
Poland's finance ministry sold a total of 6.6 billion zlotys worth of its OK0712 bonds maturing in 2012. Investors' demand reached 17.7 billion zlotys for the paper.
The Czech Finance Ministry sold a total of 3.5 billion crowns of bonds maturing in 2024. Investors bid a total of 13.7 billion crowns for the 15-year paper.
In response to hefty demand, yields of the Polish benchmark bonds fell by 3-5 basis points across the curve to 4.95 percent on two-year papers and dealers said the tender also boosted appetite for longer-dated papers.
By contrast, the yield on the Czech 15-year bond was a touch up at 5.163/067 from 5.144/000 seen before the primary auction.
"It's over-liquidity at the short-end (of the curve) that made the tender so successful," said Krzysztof Izdebski, a dealer at PKO BP. "When investors saw how good the tender was, they started also to buy five- and 10-year papers."
He also said the auction was supported by the rising zloty and improving sentiment amid comments on a possible aid package for troubled Greece.
A Polish finance ministry official said the succesful tender showed Poland was "immune" to the worries over heavily indebted countries in the euro zone periphery.
"Our domestic debt market is stable, that means foreign capitals flows into the market as well," Piotr Marczak, head of the finance ministry's debt department told Reuters.
Dealers in the Czech Republic said the 15-year bonds tender attracted more foreign investors than domestic ones.
"A big move in Greek and EU-peripheral yields was probably behind this. There are continuing stories of Greece being bailed out soon, so the market started buying risk assets today," said Dalimil Vyskovsky, a trader at Komercni Banka.
Market worries over rising budgets and debt in shakier euro zone states such as Greece have put pressure on central European bonds and other assets in the past week.
But analysts said Poland, Czech Republic and other neighbouring countries are in better fiscal shape than the euro zone's weaker states and government bond yields in the region have not jumped at the pace seen in Greece, Portugal or Spain.
Poland already met more than 16 percent of its borrowing needs for 2010 at the end of January.
For detail of the Polish tender please double click on [
]For a table with the Czech auction click [
] (Additional reporting by Jason Hovet in Prague; Editing by Andy Bruce)