The daughter of a Swedish publisher detained in China says two Chinese businessmen she met in Stockholm said her father could be released if she stopped talking to the media.

Angela Gui says that when she questioned the plan, the mood "became really threatening."

Gui spoke Sunday to Swedish broadcaster SVT about the meetings with the men, which were arranged by Sweden's ambassador to China, Anna Lindstedt.

The Swedish Foreign Ministry was not informed in advance of the meetings, and has summoned Lindstedt for an investigation.

Gui said Lindstedt was "very much engaged" in her father's case and "I don't think she had any evil intentions, but it was poor judgment."

Her father Gui Minhai, a naturalized Swede, co-owned a Hong Kong store which sold gossipy books about Chinese leaders.