After a weeks-long scandal over allegations of stalking, Swiss Army chief of staff Roland Nef resigned on Wednesday.

The Swiss government's Federal Council in a statement said it has formally acknowledged Nef's resignation.

Nef, 49, had been suspended from service in July after Zurich prosecutors launched investigations against him over allegations that he had stalked and sexually harassed his ex- girlfriend over an extended period.

The case against Nef has in the meanwhile has ended, the Swiss media reported.

Swiss President Pascal Couchepin thanked Nef on Wednesday for his commitment to the post, expressing regret over the circumstances of his departure.

The scandal however has also brought Swiss Defence Minister Samuel Schmid under scrutiny, with calls from various political parties for for his resignation.

At the end of 2007, Schmid had supported Nef for the job of army chief without informing other members of parliament about the sexual allegations already hanging over him.