The wife of a former Swiss ambassador has been tied to a money laundering case under investigation by Spanish police, allegedly involving a Chinese mafia network and two Geneva banks, Radio Télévision Suisse reported late on Wednesday.

The woman, identified as Madame G, is suspected of handing over envelopes, each containing around €200,000 in cash, to another woman who was arrested in Spain last yearr.

The deliveries occurred at different spots in Geneva, in partic...