Nigeria's Minister of Innovation, Science and Technology Uche Nnaji has resigned just days after allegations emerged that he had forged his academic credentials.

The resignation follows a newspaper investigation that claimed Nnaji submitted falsified certificates to President Bola Tinubu during his ministerial appointment in 2023.

Presidential spokesperson Bayo Onanuga confirmed Nnaji's resignation in a post on X late on Tuesday, quoting the minister as saying he had been a target of blackmail by political opponents.

Nnaji has denied the accusations of forgery and insisted that he did graduate from the University of Nigeria, Nsukka (UNN) with a degree in Microbiology/Biochemistry.

The forgery allegations have sparked outrage among some Nigerians, following a two-year investigation by the Premium Times newspaper.

Last week, UNN reportedly told the publication that it had no records confirming that the minister had graduated with a Bachelor of Science degree in 1985, as he had claimed.

A senior university official stated that Nnaji was admitted in 1981 but never completed his studies or received a certificate.

The National Youth Service Corps (NYSC) also mentioned that the mandatory certificate of national service Nnaji presented in April 2023 could not be verified.

The suspension or removal of a minister is rare in Nigeria - Nnaji is only the second to leave office since President Tinubu assumed power in May 2023, following public outrage over a corruption scandal earlier this year.