Ibe Kachikwu, minister of state for petroleum resources, refused to speak with reporters at the end of a meeting with President Muhammadu Buhari.

Dressed in a black suit, the minister arrived the presidential villa around 11:35am and walked straight into the president’s office.

He left after over an hour. Asked what the meeting was about, Kachikwu said: “No comment.”

The meeting took place three days after a letter which Kachikwu wrote against Maikanti Baru, group managing director of the Nigerian National Petroleum Corporation (NNPC), was made public.

In the letter, Kachikwu accused Baru of insubordination. He also alleged that the NNPC GMD approved a $25 billion contract without following due process.

The letter has been generating some reactions.