Two reporters who were arrested while covering the protests in Ferguson, Mo., last August, were charged with trespassing and interfering with a police officer, their outlets said on Monday.

The reporters, Wesley Lowery of the Washington Post and Ryan J. Reilly of the Huffington Post, were arrested at a McDonald’s restaurant while covering nightly demonstrations that followed the fatal shooting of Michael Brown, an unarmed black teenager, by Darren Wilson, a white police officer.

In an account Mr. Lowery wrote of the incident, he said he had been arrested after receiving contradictory instructions from the officers about which direction to exit the restaurant, which had served as a kind of staging area for reporters. At the time, the Post’s executive editor, Martin Baron, said that there had been “absolutely no justification for his arrest.

The Post reported Monday that Mr. Lowery had been ordered to appear in a St. Louis County municipal court on Aug. 24.