Assistant Chief Constable, Bernard Higgins, has been suspended by the Scottish Police Authority.
The Police Investigations & Review Commissioner (PIRC) is investigating allegations of criminality against officers serving with Police Scotland.
The allegations were provided to the PIRC anonymously and the Commissioner subsequently referred them to the Crown Office and Procurator Fiscal Service (COPFS), as the body responsible for the prosecution of crime.
Deputy Chief Constable Iain Livingstone said: “I can confirm that Assistant Chief Constable Bernard Higgins was suspended today by the Scottish Police Authority.
“In addition, three other officers have been suspended, and two others placed on restricted duties, by Deputy Chief Constable Rose Fitzpatrick.
“This is connection with an investigation by the Police Investigations & Review Commissioner.
“At this time our focus must remain on continuing to meet the operational challenges that we face each day.
“I will be reviewing the command team structure and in the meantime ACC Nelson Telfer will take on responsibility for the Operational Support portfolio in addition to his existing duties.”