According to an example embodiment, a technique in a monitoring device for remote monitoring of at least one vital sign of a living subject is provided, the technique including capturing one or more sensor signals that are descriptive of respective characteristics of a body of the subject from a distance, deriving, on basis of said one or more sensor signals, at least a first biometric signal that is descriptive of a second predefined vital sign of said subject for transmission to a server device, detecting presence of another monitoring device that is operating to derive a first biometric signal that is descriptive of a first predefined vital sign of the same subject for transmission to the server device, and controlling derivation of said first biometric signal in the detected another monitoring device in response to detecting said another device.