U2 bought Eagles of Death Metal new phones and offered them use of their plane after the Paris terror attacks.
The Irish group purchased new mobiles for the US rockers after their devices were left inside the Bataclan theatre, where terrorists opened fire and killed 89 people during their gig last month.
U2 were in the French capital to play two shows, on November 14 and 15, but had to cancel them when a series of terror attacks, which killed 130 people, occurred in Paris on November 13.
Frontman Bono said: "We left the next evening - we had a plane, which we put at the Eagles' use if they wanted it, but they found another way. The best thing we could do for our fellow musicians was to buy them phones."
Bono believes the group should undergo counselling following the horrific ordeal.
He said: "Jesse [Hughes] took me through every moment. They really need proper counselling, though - not from a well-meaning Irish rock star. Because post-traumatic stress disorder is a real issue for people who go through these things. They're going to come through fine, but it was pretty bad."
The 55-year-old star admitted U2 are usually reluctant to call off gigs, but knew it was the right decision in the wake of the atrocity.
He added to the New York Times newspaper: "U2 doesn't have a history of cancelling many shows. I suppose the Irish in us just doesn't want to give in to terrorism. We've had it all our lives.
"But the look on [the head of global touring for Live Nation] Arthur Fogel's face, I could just see that this was not going to happen. And then: How could we be useful for the Eagles of Death Metal? What could we do while we were here in Paris?"
U2 will return to Paris on Sunday (06.12.15) and Monday (07.12.15) to play their rescheduled gigs.