Families and relatives of those killed and injured in the Creeslough tragedy are to bring civil cases against the operators and owners of the Applegreen service station, and management company for the adjoining apartments where an explosion killed ten people in 2022.
Damages are being sought for personal injuries and nervous shock.
It's understood the cases could be heard within a year.
Solicitor Damien Tansey confirmed he has submitted lawsuits on behalf of 25 people, including families of those killed in the explosion.
Members of the Lafferty family, Vivo/Shell Limited, Duntally Woods Apartment Owners Management Company, Donegal County Council, the Commission for the Regulation of Utilities and Applegreen Limited are among the co-defendants named in recently filed cases.
"I can confirm our office has now submitted numerous personal injury lawsuits. We represent about 25 people and there are a further six or seven apartments occupiers," Mr Tansey said.
He added: "High Court actions have commenced in relation to numerous injured parties, including on behalf of families of deceased victims and people who themselves suffered catastrophic injuries.
"One of the defendants is in liquidation, which means we have to get the consent of the High Court to proceed.
"We had to first submit the claims to the Injuries Resolution Board," he added.
The cases, which were initiated between last October and June of this year, are against individuals and entities associated with the blast site. Six different law firms are representing the plaintiffs in those cases.
Among the litigants are Donna and Hugh Harper, who lost their 14-year-old daughter Leona in the explosion, and Amanda Faul, Marie Ronaghan and Kathryn McDevitt, sisters of Martina Russell, who died in the tragedy.
Mr Tansey confirmed some of the lawsuits include claims by apartment owners who are concerned that insurance will not cover the full value of the properties that were destroyed.
The permission of the High Court was required before the most recent cases could be initiated as one of the co-defendants, Register of Gas Installers Ireland, is currently in liquidation.
In total, 12 different individuals or entities are listed as defendants in the latest cases.
Four men, three women and three children, ranging in age from five to 59, died in the explosion on 7 October 2022.
They were five-year-old Shauna-Flanagan Garwe and her father -Robert Garwe (50), 14-year-old Leona Harper, 59-year-old Hugh Kelly, 24-year-old Jessica Gallagher, 49-year-old Martin McGill, 48-year-old James O'Flaherty, 49-year-old Martina Martin, 39-year-old Catherine O’Donnell and her 13-year-old son James Monaghan.
While a sudden gas leak is suspected to have caused the explosion, a garda investigation has yet to conclude.
The probe is being supported by the Garda National Bureau of Criminal Investigation and other agencies, including the Health & Safety Authority and the Commission for the Regulation of Utilities.
A man in his 60s was arrested as part of the inquiry in May but was released without charge, bringing to five the number of people questioned as part of the investigation.
Several bereaved family members and survivors have pressed for a public inquiry, saying they are still in the dark regarding why their loved ones lost their lives.
Their calls have been supported by Donegal County Council, whose members passed a motion last year seeking the establishment of one.
Vivo/Shell Limited, whose directors are Danny Martin Lafferty and Annette Lafferty, was granted permission by the council in February to erect a service station at the site of the explosion.
The decision caused considerable upset among the families of victims and was overturned last month -following appeals to An Coimisiún Pleanála.
The proposed development would have involved demolishing the existing building and erecting a new building which would have included a shop, post office, beauty salon, fuel pumps and memorial features, including a sculpture featuring 10 metal poles to commemorate those who died and space for a memorial garden.
However, An Coimisiún Pleanála said the development would be out of -character with its surroundings and would seriously detract from the architectural character and setting of Creeslough.
