The cruiser "Jean de Vienne", in drydock, was boarded by German troops, who disarmed the demolition charges, but the open sea valves flooded the ship. She sank, blocking the drydock. In another drydock, the captain of the damaged , which had been heavily damaged by the British in the attack on Mers-el-Kébir, at first refused orders to scuttle, but was persuaded by his colleague in the nearby cruiser to follow suit. The crew opened the holes caused by British torpedo attacks to sink the ship, and demolition charges destroyed her vital machinery. As "Dunkerque" exploded, "La Galissonnière" reproduced the manoeuvre executed by "Jean de Vienne".