South Korea's anti-piracy unit searches for Mongolian ship off Somalia
South Korean foreign ministry said communication with the squid fishing vessel, with three Koreans and 18 Indonesians on board, was cut after midnight on Friday.
The ministry said India, Germany and Japan have deployed aircraft to the waters off Somalia to search for the vessel.
"We are working with authorities in related countries including the United States, Germany, India and Japan," the ministry said in a statement.
It said South Korean President Moon Jae-in asked related ministries to "put the utmost priority on human lives and make sure that they will be rescued". ■