Staff at a privately-run care home have been cleared of any wrongdoing in connection with the deaths of five elderly residents.
Horsford Court is a residential care home for the elderly
Norfolk Police began an investigation in June after a series of deaths at Horsford Court Care Home in Norwich.
But now Det Ch Insp Julian Gregory said no one had been found to be "criminally culpable" for the deaths.
Police are still carrying out a probe into standards of care at the home which cares for 51 elderly people.
Det Ch Insp Gregory said: "Over the last few months specialist officers have been conducting a careful examination of a large number of records and have been interviewing witnesses in order to establish the circumstances surrounding the deaths of five people resident at Horsford Court.
"This has now been concluded and following consultation with the Crown Prosecution Service we are satisfied that there will be no prosecution in relation to this part of the inquiry.
"However, we are still investigating issue relating to the treatment of residents at Horsford Court and work is ongoing in respect of this."
In a statement Southern Cross Healthcare, which runs the home, said: "Naturally we are pleased that the investigation has determined that no criminal proceedings are to be issued.
"The findings reflect our own extensive investigation.
"We are somewhat disappointed that the police have continued the investigation given that no explanation has been provided as to why."