The Independent Police Complaints Commission (IPCC) is managing two separate investigations into claims two Merseyside Police officers abused their positions to sexually exploit women.
The investigations will be carried out by Merseyside Police under the direction and control of the IPCC.
One investigation will examine claims a Sergeant threatened to arrest a woman while on patrol in Liverpool unless she performed a sex act on him. The officer is also being investigated over the handling of police property.
The second investigation will look at allegations involving a Detective Constable who is said to have asked a victim of domestic violence to perform a sex act on him, and then continued to contact her in an inappropriate manner over a prolonged period of time.
Both investigations will look at other potential victims and examine whether Merseyside Police has adequate systems to identify officers abusing their powers for sexual gratification.
IPCC Commissioner James Dipple-Johnstone will oversee the investigations.
Both officers have been suspended from duty by Merseyside Police.