Making her first public comments on the mystery surrounding Meng Hongwei's whereabouts, Grace Meng told reporters in Lyon, France on Sunday she thinks the knife was her husband's way of trying to tell her he was in danger.
She says she has had no further contact with him since the message that was sent on 25 September. She says four minutes before Meng shared the image, he had sent a message saying, "Wait for my call."
She says she hasn't heard from him since and does not know what happened to him.
The disciplinary organ of China's ruling Communist Party said Sunday Meng is under investigation on suspicion of unspecified legal violations.
The party's watchdog for graft and political disloyalty said on its website late Sunday that Meng Hongwei, China's vice minister of public security, is "suspected of violating the law and is currently under the monitoring and investigation" of China's new anti-corruption body, the National Supervision Commission.
Meng, a Chinese national, was first reported missing on September 29. Interpol said in a statement it was "aware" of the Meng's alleged disappearance, but that France and China was responsible for the investigation.
Rights groups previously said that Beijing could use Meng's position to arrest and deport its critics abroad.
Interpol is headquartered in Lyon.
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