The two mainstream and pro-European groups, the conservatives and the socialists, lost a few seats but remained the dominant forces. The Greens were expected to lose about 20 seats.
The move comes as the first projected results from France on Sunday put the far-right National Rally party well ahead in the European Union's parliamentary election.
Far-right parties made such big gains at the European Union parliamentary elections that they dealt stunning defeats to two of the bloc's most important leaders: French President Emmanuel Macron and German Chancellor Olaf Scholz.
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