Referring to the April 2 car bomb explosion perpetrated in Santa Tecla, the FMLN-FDR claimed responsibility for the attack in a communique, and said that it was "an action aimed directly at the police" and that "they regret the death of a civilian," but they did not mention compensation for the relatives.

Based on that paragraph can we conclude that the sentence below is true?
A civilian was killed by a car bomb.

pick from the following. (a). yes; (b). no;
(a).