Two of the 59 people killed in the mass shooting during a country music concert in Las Vegas on Sunday night were close to the family of Colorado assistant football coach Darrin Chiaverini.

Christopher Roybal, 28, was the former brother-in-law of Chiaverini’s brother, Ryan, while Hannah Ahlers, 34, was a close friend of Chiaverini and his wife, Shannon.

“It’s been rough, of course, on them,” CU head coach Mike MacIntyre said Tuesday during his weekly press conference. “When you come into work and all of that is going on, and you think, ‘Ah, that’s in Las Vegas,’ and two of the 59 people are close … it’s extremely tough.

“You can imagine Darrin’s family and everything they’re going through right now. Please remember Darrin and their family and all the things they’re going through.”

On Monday, Darrin, the Buffaloes’ co-offensive coordinator and receivers coach, tweeted, “Our families hearts are broken with the passing of Chris Roybal and Hannah Ahlers in Las Vegas! Our prayers are with their families.”

He also tweeted, “Make sure you kiss your loved ones and hold them close. Lost some good people last night in Las Vegas. A lot of good memories!”

Ryan Chiaverini told CNN that Roybal was at the concert celebrating his 29th birthday with his mother.

Ahlers was reportedly at the concert with her husband. She leaves behind three children.

For those who want to help the family of Ahlers, donations are being accepted at gofundme.com/hannah-ahlers-las-vegas-victim or https://www.gofundme.com/chris-roybal-family-relief-fund?u=16184346.

MacIntyre said he gave Chiaverini the go-ahead to miss Saturday’s game against Arizona if needed, but Chiaverini is planning to be on the sidelines with the Buffs that night.

Contact staff writer Brian Howell at howellb@dailycamera.com or twitter.com/BrianHowell33.