Nigeria, May 27 -- The African Democratic Congress (ADC) presidential primary descended into acrimony on Tuesday as a contestant, Mohammed Hayatu-Deen, boycotted the official announcement of results, claiming the process was marred by widespread vote rigging and irregularities.

Mr Hayatu-Deen announced his decision via a post on X, stating he would not be present at the result declaration scheduled for Tuesday.

"I will not be attending the announcement of the ADC Presidential Election Results today," he wrote. "I am concerned by reports from across the country of widespread vote rigging, some of which I myself observed, and will therefore be taking advice on my next steps."

The boycott has heightened tensions within the opposition part...