One of the suspects in the Paris attack on Charlie Hebdo magazine has been killed and the two others are in custody, two senior U.S. counterterrorism officials told NBC News on Wednesday.

French authorities would not confirm the U.S. officials’ report.

Authorities earlier had identified the three men as Said Kouachi and Cherif Kouachi, both French and in their early 30s, and Hamyd Mourad, 18.