A former nurse who admitted killing more than 30 patients with lethal drug overdoses has been jailed for life by a court in northern Germany.

identified as Niels H, 38, was convicted of two counts of murder and attempted murder.
He told the court last week he had acted on impulse and apologised to the victims' relatives.
The deaths took place at the Delmenhorst clinic, where he worked in intensive care between 2003 and 2005.
The former nurse was accused of injecting patients with a medication that should only be used under strict supervision of doctors because it can trigger fatal cardiovascular reactions.
Prosecutors at the district court of Oldenburg said he had been bored and had wanted to practise his - as he himself described them - "excellent" resuscitation skills. If his first attempt at resuscitation was successful, they said, he would sometimes make a second attempt.
A senior doctor heard earlier on in the trial described Niels H as a "passionate medic" who had made a good impression on staff at the clinic.
Doctors did notice, however, that he always seemed to be around when patients were being resuscitated, often assisting junior doctors with the procedure, he added.