Japan and North Korea on Wednesday wrapped up the third round of official talks in Stockholm, Sweden, without yielding any significant breakthroughs.

Government officials from the two nations failed to agree on the start of a re-investigation into Japanese citizens abducted by North Korean agents in late 1970s and early ’80s. But they agreed to continue government dialogue.

“We agreed to continue negotiations, but no specific schedule for negotiations was set,” said Junichi Ihara, head of the Foreign Ministry’s Asian and Oceanian Affairs Bureau, who led Japan’s delegation.

The three-day talks followed the second round, held in late March in