The head of Ukraine's parliamentary commission investigating the poisoning of opposition leader Viktor Yushchenko has called for an emergency meeting Tuesday.

Reports from the region say Volodymyr Syvkovych told journalists in Kiev that medical tests showing that Mr. Yushchenko was deliberately poisoned have given the commission grounds to reopen the investigation.  Prosecutors in Ukraine are conducting a separate investigation.

Mr. Syvkovych urged doctors who conducted the tests in Vienna to hand over the test results to prosecutors and his commission.  He also called on Mr. Yushchenko to testify before the parliamentary commission.

On Monday, Ukrainian Prime Minister Viktor Yanukovych accused Washington of financing his rival's presidential campaign.  But, U.S. officials said they have no favored candidate, and that aid sent to Ukraine is only for promoting free elections and democracy.