In Milan this week, Olympics officials signaled a willingness to ease years of restrictions imposed on the country over its state-backed doping program and invasion of Ukraine.

The F.BI. and local law enforcement gave no details about the note, which came on the sixth day of the search for Ms. Guthrie, the mother of the “Today” host Savannah Guthrie.

The ruling by China’s highest court followed a recent meeting between China and Canada’s top leaders that led to a thaw in the two countries’ relations.