The Nigeria Police Force on Thursday raided Premium Times head office in Abuja and arrested the publisher, Dapo Olorunyomi, the online medium has reported.
Also arrested was judiciary correspondent, Evelyn Okakwu.
Plain clothed officers who said they were acting on a complaint by Chief of Army Staff, Tukur Buratai, conducted search at the office shortly after 5pm.
Editor-in-chief of the paper, Musikilu Mojeed, condemned the raid.
The Nigerian Army had recently demanded that Premium Times retract some news stories about its operations.
“They should stop deluding themselves that they can muzzle the press and intimidate Premium Times,” said Mr. Mojeed. “They should know that our loyalty lies with our readers and the Nigerian people who have a right to know.”
He said the paper will continue “to discharge its responsibilities in line with global best practices, social responsibility and patriotism, even at great risk to our personal liberties”.