France's Defense Ministry says 668 personnel aboard the French aircraft carrier Charles de Gaulle have tested positive for COVID-19.

Among those who tested positive are two of four U.S. sailors on board.

A provisional assessment published on Wednesday by the ministry said "31 are today hospitalized at the Sainte-Anne army training hospital in Toulon, including one in intensive care."

France is one of the European countries most affected by COVID-19, having ecorded more than 130,000 cases and over 17,000 deaths.