WARSAW (Reuters) - Russia cannot be trusted to honour an agreement to allow the export of Ukrainian grain from Odesa, the Polish prime minister said on Wednesday, after Moscow launcehed a missile strike on the Black Sea port.

"The day after the signing (of the agreement), the Russian armed forces... attacked Odesa," Mateusz Morawiecki told a news conference. "It follows that such agreements cannot be considered fully credible, because unfortunately that is what Russia is like."

(Reporting by Alan Charlish and Anna Koper; Editing by Jan Harvey)