A WHITE nationalist Norwegian man who killed his stepsister and then opened fire on an Oslo mosque was today sentenced to spend more than two decades behind bars.

Philip Manshaus, who had told the court that he regretted not having caused more damage, “has proven to be an extremely dangerous person,” prosecutor Johan Oeverberg said as he demanded the maximum jail term of 21 years.

Mr Manshaus, 22, killed his 17-year-old stepsister, Johanne Zhangjia Ihle-Hansen, shooting her four times with a hunting rifle at their home in the Oslo suburb of Baerum last year.

Ms Ihle-Hansen had been adopted from China at the age of two.

He then drove to a nearby mosque where three men were preparing for Eid al-Adha celebrations. Mr Manshaus fired four rifle shots at the mosque’s glass door before being overpowered by one of the men in the mosque, Muhammad Rafiq.

Mr Manshaus, who wore a bulletproof vest and a helmet with a video camera during the attack, was armed with the hunting rifle and a shotgun.

Judge Annika Lindstroem of Oslo District Court said the defendant had planned to kill as many people as possible and set fire to the mosque.

Mr Manshaus believed that “Europe is under attack from people of ethnic origin other than his own” and that “the white race is on the brink of extinction,” said Ms Lindstroem.

In court, he confessed to the crimes but described them as “emergency justice.” Investigators found a photo of Adolf Hitler on his mobile phone.

The presiding judge said that Mr Manshaus had been inspired by  the March 2019 shootings in New Zealand, in which a gunman killed 51 people at two mosques, and in August 2019 in El Paso, Texas, where an assailant targeted Hispanics and left at least 22 dead.

Mr Manshaus cited Hitler and  fellow Norwegian Anders Breivik, who killed 77 people in 2011 during a bombing and shooting rampage, as role models.

Mr Breivik, who gave a Nazi salute in the courtroom, is serving a 21-year prison sentence for carrying out a terror attack.