ABUJA (Reuters) - Nigerian police have arrested a witchdoctor employed by a politician to perform rituals at an election tribunal, local media reported on Thursday.

Officers caught Oluwole Abiodun on Wednesday at the court building in south-western Ondo state with charms and copies of the Bible and Koran in a black plastic bag.

A pot containing a rabbit, seven eggs, cowrie shells and palm oil was found nearby, the state News Agency of Nigeria said.

"Abiodun said that he was sent by one of the principal officers of the state House of Assembly to perform some rituals in the court premises," the agency said.

Hundreds of cases are being heard across Nigeria to resolve disputes arising from April elections that were so heavily rigged they were deemed not credible by international observers.

The witchdoctor's rituals would have been intended to ensure that the challenge to the election of the legislator failed.