A South Korean cargo vessel is missing after making its last contact in the South Atlantic about 2,500 kilometers (1,500 miles) from shore and 22 crew members are unaccounted for, South Korea’s foreign ministry and news reports said on Sunday.

Two Filipino crew members have been rescued floating in a life raft on Saturday, but other lifeboats and rafts found in the area were empty, South Korea’s Yonhap news agency reported.

“A search operation is continuing for the 22 people,” a South Korean foreign ministry official in Seoul said by telephone, adding eight of the missing are South Korean nationals and 14 are Filipinos.