The head of Interpol, Meng Hongwei, has reportedly been missing since a visit to China last week.

Meng has not been seen or heard from since his trip at the end of September and French authorities have now opened an investigation into his whereabouts, according to German public broadcaster Deutsche Welle.

Meng Hongwei’s wife reported Friday that she had not heard from her 64-year-old husband since he left Lyon, France, where Interpol is based, said the official, who spoke on condition of anonymity to provide details of an ongoing investigation.

The French official said Meng did arrive in China. There was no further word on Meng’s schedule in China or what prompted his wife to wait until now to report his absence.

Meng was elected president of Interpol in November 2016. His term runs until 2020.

Interpol is yet to comment on the reported disappearance.