But as news spread across social media, fans — as well as many more who had probably never heard of the group before — expressed horror over the scene at the Bataclan. Witnesses said that gunmen fired into the audience, and French television and news services reported that at least 100 people were killed there.

The band’s members were reported safe on Friday night. “No members of the band were killed,” said a statement from Universal, the band’s label. “That is confirmed.”

The Bataclan, which can hold about 1,500 people, dates from the 1860s and was named after an operetta by Jacques Offenbach, the 19th-century master of French light opera. But in recent years, the space has become known for rock concerts, and according to some reports, Eagles of Death Metal was playing to a sold-out house on Friday night.

The band, formed in 1998, is closely associated with Queens of the Stone Age, which specializes in the fuzzy guitar sounds of 1970s metal. Joshua Homme, the leader of Queens of the Stone Age, is the other primary member of Eagles of Death Metal, which was on a European tour for “Zipper Down,” its first album in seven years. Mr. Homme, who rarely tours with Eagles of Death Metal, was not with the group in Paris.

The music industry was largely stunned by the news of the massacre on Friday night. The band U2 announced that it had canceled a concert scheduled in Paris on Saturday. HBO was to have broadcast it live.

“We watched in disbelief and shock at the unfolding events in Paris and our hearts go out to all the victims and their families across the city tonight,” the band said in a statement. “We are devastated at the loss of life at the Eagles of Death Metal concert and our thoughts and prayers are with the band and their fans.”