A Dutch nurse has been accused of murdering 14 people, according to public prosecutors.
Her victims are said to include babies, young children and elderly patients at four hospitals in The Hague.
Prosecutors have described the woman as a "classic psychopath".
The killings are alleged to have taken place over a four-year period between February 1997 and September 2001.
The nurse, who has also been charged with four attempted murders, is due to go on trial in The Hague in June.
The woman, aged 40, is accused of killing five babies and children and nine elderly people in her care, by giving them a lethal dose of drugs.
"The nurse is suspected of killing the victims by giving them substances such as potassium... and morphine," Hague prosecutors said in a statement.
"In certain cases, the nature of the deadly substance could not be determined."
British nurse Beverley Allitt was jailed for the murder of four babies in her care.
Some of the deaths were said to have occurred in a children's ward and a prison infirmary, but the prosecutors' statement gave no indication of the illnesses suffered by the victims.