Gardaí in Donegal investigating suspected arson attacks - are continuing to question two men in Buncrana Garda Station.
The men, aged 20 and 21 are being held under Section 4 of the Criminal Justice Act.
Since early July, there have been eleven incidents of fires in the Buncrana area.
The attacks have been random - some of the properties targeted include unoccupied buildings, farm sheds, vehicles and a health centre.
These latest arrests brings to seven the number of people arrested in connection with the attacks.
So far, two men have been charged over the incidences.