'Golden boy' son of Russian tycoon goes on the run after 'beating porn star to death and seriously assaulting four prostitutes'

The 'golden boy' son of a Russian tycoon is on the run after allegedly beating a porn star to death and seriously assaulting four prostitutes.

Ex-Gazprom executive Andrey Demenkov, 32, struck mother-of-one Olga Kudrova, 21, more than 100 times with a blunt instrument, according to the criminal case against him.

He had also sought to drown her in a bath but she died from a blow to the temple, said a forensic report.

Police say the woman worked as an escort as well as being an adult actress, but before visiting Demenkov she told relatives she was seeing the man she loved.

In July, he had allegedly kidnapped and 'severely beaten' a 32-year-old woman at his St Petersburg apartment where Kudrova was found dead.

Four other women - all sex workers - were also attacked and suffered serious injuries, said police.