The strange story of the vanishing Interpol chief just got even stranger. Days after Meng Hongwei, the president of Interpol, was reported missing in China, the Chinese government said on Monday that Meng was “under supervision” and being investigated on bribery charges. Meng, a Chinese national, has also resigned from his post “with immediate effect,” according to a statement from Interpol.

It’s a stunning development in a bizarre saga that began unfolding late last week.

Meng, who led Interpol, an international organization that coordinates law enforcement agencies worldwide, traveled from France to China on September 29.

Then he disappeared.

Meng’s wife went to the authorities in Lyon, France, on October 4 — where Interpol is headquartered — to say she hadn’t heard from her husband since he landed in China. Meng’s wife also told journalists Sunday that Meng had sent her a text message of a knife emoji before he vanished — which she interpreted as a sign that he was in danger.

According to the South China Morning Post, Meng is a former Communist Party official whose lost his position in the party last year.

The head of Interpol seems to have been caught in a widening anti-corruption crackdown

Meng helps set Interpol’s policies and agenda, but he doesn’t run the day-to-day operations of the world’s largest international police organization, which provides support to law enforcement agencies across 192 countries.

Interpol focuses on cross-border or transnational crimes, such as trafficking and, well, cases of missing people. It’s probably best known for issuing color-coded “notices,” or worldwide alerts for law enforcement. For example, a “red notice”is basically a flag that a specific agency is looking to apprehend someone.

Interpol itself can’t arrest people, but critics say some authoritarian countries (Russia and China, among them) abuse the system to target strong critics or dissidents by issuing wanted notices through the organization.

China has also used Interpol to identify allegedly corrupt officials. That led to some speculation that Meng might have been ensnared in an anti-corruption investigation — a suspicion that was ultimately confirmed.

Chinese President Xi Jinping has recently presided over a sweeping anti-corruption crackdown, which he used to help consolidate his power earlier this year. Officials who are targeted by the anti-graft campaign often vanish for weeks or months.

“It is hard to imagine another international organization feeling comfortable placing a Chinese national in charge without feeling nervous that this might happen,” Ku said.

Meng’s disappearance also puts more attention on the Xi’s widening anti-corruption campaign in China, and the country’s draconian detainment and judicial processes. China has already garnered unwanted international attention this year for its mass detention of religious minorities, including the Muslim minority Uighurs.