Rastorgujevs was second to Norwegian Johannes Thingnes Bø. The bronze was taken by French Quentin Fillon Maillet.
The winner completed the race in 34 minutes and 50.2 seconds. Rastorgujevs was 15.1 seconds behind.
Before now, Rastorgujevs' highest achievement in mass start was last year when he finished fifth.
Photo: SCANPIX/AFP
Photo: SCANPIX/dpa/picture-alliance
Photo: Scanpix/AFP, MICHAL CIZEK
