Fox News Channel and CNN saw their ratings spike Monday evening as viewers tuned in to learn about the death of comedian and actor Robin Williams, reports Deadline.com.

Fox News Channel drew a prime-time audience of 2.394 million total viewers, with 574,000 in the news demographic of 25-54. That was a jump of 80% in the demographic compared with its second-quarter average, the story notes.

CNN drew 1.425 million prime-time viewers, and 568,000 in the demographic, which the story says was a 279% increase. It was the biggest viewership in the news demographic since CNN aired the George Zimmerman trial verdict last year, the piece adds.

“CNN’s night included a rare 8 p.m. demo win, with Wolf Blitzer filling in for Anderson Cooper on an hour largely devoted to Williams’ death,” the Deadline report notes. “CNN logged 735,000 demo viewers in the hour, edging FNC’s 688,000, and thumping MSNBC’s 169,000. Last time CNN topped FNC at 8 p.m.? During its coverage of missing Malaysia Airlines Flight 370, in March.”

MSNBC saw a slight boost in its prime-time audience, with its demographic number up 18% to 180,000, along with 761,000 total viewers.

Wolf Blitzer