The victim of a suicide attack in Kabul had been living with his fiancee in County Londonderry, Northern Ireland.
Mr Chase's fiancee Norma McDowell was being comforted by family and friends after learning of the news.
It is understood the couple lived together with two children in the Drumachose Park area of the town.
The ex-Cheshire Regiment soldier had worked as a nightclub doorman in Limavady before travelling to Kabul to work in the security industry.
More top news
The former head of the Diplomatic Service breaks down the hidden meanings behind Theresa May's letter to Donald Tusk
The storms that struck Texas and Oklahoma late on Tuesday brought tornadoes, tennis ball-sized hail and powerful winds.
Samantha Baldwin, 42, and her sons Louis Madge, nine, and Dylan Madge, six, haven't been seen for two days.