Authorities in Greece say they believe a wildfire that's killed at least 83 people was started deliberately.
One of the country's ministers confirmed there are "serious indications" arson was the cause of the blaze.
Searches are continuing for dozens of people still missing in resort areas near Athens.
Irish man Brian O'Callaghan-Westropp, who was on honeymoon in Mati with his wife, was among those killed in the wildfires.
Franco de Bonis is from Blood Bikes East - where Brian volunteered.
He says everyone there is devastated.
"A completely volunteer-driven organisation needs people who will get involved, roll up their sleeves and get involved, and Brian was definitely that.
"He gave so much time to the charity and to the work we did.
"So we are really trying to figure out how we are going to move forward without him".