A former interior minister says he will resign his seat in parliament next week to face a probe on charges of manslaughter in the case of a policeman who died while escorting the politician.

Sen. Gabriel Oprea announced his decision on Facebook Friday, a day after thousands protested against parliament for voting on Sept. 19 not to lift Oprea's parliamentary immunity to allow an investigation.

The police officer died in October last year when his motorbike hit a pothole.

Public outrage over motorcades exploded after it emerged that Oprea used a motorcade five times a day while he was minister.

Oprea initially refused to resign as minister, but stepped down in November when the government collapsed following street protests over a nightclub fire that killed 64.