In the wake of the worst-ever mass outbreak among service members, the ministry brought them all home, weeks ahead of schedule, and sent them either to military hospitals or other facilities for treatment and necessary quarantine measures. "Three of them showed moderate symptoms. We will continue to closely monitor the conditions of the crewmembers and take necessary steps," a ministry official said. Their destroyer left an African port earlier in the day, after the ministry sent a team of crewmembers there Tuesday to pilot it back home. The new batch of the Cheonghae unit arrived in the Gulf of Aden recently and is working to begin peacekeeping missions, according to officials.