A desperate battle ensued.

A portion of the garrison crossed in boats to the assistance of their friends, Edmund leading over his band of Saxons.
With these he fell upon the rear of the Danes engaged in fighting with the force under the count, and the Northmen, attacked on both sides, gave way and took to flight.

They were hotly pursued by the Franks.
The reinforcements entered Paris triumphantly by the bridge, which had long since been repaired.

But the siege was not yet over.

When the news of the victory of Eudes spread, the Danes again drew together from all parts, and crossing the river, attacked the city on every side.