Cameroon's President Paul Biya has filed papers to stand for re-election next month.

Officials for the ruling CPDM party submitted Mr. Biya's documents to the national electoral commission Sunday.

The 78-year-old Mr. Biya has ruled Cameroon since 1982. In 2008, he pushed through constitutional changes that eliminated term limits. The changes triggered anti-government riots in which at least 40 people were killed.

Some opposition supporters have urged Mr. Biya to step down, or they argue that the old term limits still apply to him.

CPDM officials said Sunday that the president is “answering the call of the people” to run again.

The election will be held October 9. Official campaigning begins September 15.