Berlin - German police on Wednesday said they had arrested a nurse for allegedly trying to give overdoses to at least three patients in his care. Police and prosecutors told reporters that the 24-year-old suspect tried to play the saviour by taking the patients to the brink of death before reviving them. The case recalled that of Niels Hoegel, a German nurse sentenced to life in prison last year for murdering 85 patients. The authorities received a tip on Sunday from a doctor at the Munich hospital where the suspect had worked since July, and said they were now investigating all potentially suspicious cases on his watch.  The nurse, who was not identified by police, was arrested on Monday on three counts of attempted murder and grievous bodily harm -- allegations he denies. Prosecutor Anne Leiding told reporters his online chats indicated he said he “endangered the lives of patients just so he could later be seen as the brilliant saviour”. The nurse worked at a ward for patients who have recently emerged from intensive care and are still under close medical observation. In two of the cases in question, the condition of a 91-year-old male patient and a 54-year-old woman being treated suddenly worsened on Saturday. They could only be revived with emergency measures, Josef Wimmer, head of the Munich police murder division, told a news conference. A doctor became suspicious and ordered blood tests, which found high levels of an unspecified medication they had not been prescribed.

The same doctor then identified another dubious case, a 90-year-old patient from late last month, and a blood test turned up similar results, Wimmer said.