Tuesday will see the completion of post-mortem investigations into the deaths of two Dublin-born teenagers on the Greek island of Ios.
Max Wall and Andrew O'Donnell attended St. Michael's College when they were both 18 years old.
After going missing on Friday night following a night out, Andrew's body was discovered on Sunday morning in a rocky area. It's believed he may have dropped.
Irish broadcaster RTÉ reported that Max passed away on the island's port a few hours later.
Tim Kelleher, the principal of St. Michael's, declared that the deaths have left the school community "absolutely devastated.".
He declared on RTÉ's Morning Ireland: "We are devastated. These are two fantastic young men with their lives ahead of them, and our community is very close-knit.
Bright, athletic, and intelligent men who had their entire lives ahead of them had been looking forward to this particular trip for months, and planning had been ongoing in many other schools in addition to ours.
I estimate that this morning, hundreds of families are experiencing extreme sadness as a result of what happened. And once more, we are in complete disarray," he said.
The nightmare of every parent.
Every parent's worst nightmare comes true when large groups of children travel together or go on vacation.
You just don't want to get the call that your child is missing, but two of our families have received that call, and we are heartbroken for them and send our condolences to all of them. ".
The Irish Embassy in Athens is offering consular support, and a consular officer is "on the ground" in Ios, according to Tánaiste and Minister for Foreign Affairs Micheál Martin.
In an interview with RTÉ, Mr. Martin said, "We'd just ask them to look after each other over the next number of days. Many of their friends are out there in Ios, and it's a very, very difficult time for them now.
Before the bodies are returned home in the coming days, the post-mortem examinations will be performed in Athens on Tuesday.