A town councillor has been remanded in custody charged with causing an explosion after a series of blasts saw residents evacuated from their homes in Denbigh.
Liberal Democrat John Larsen, 46, from Lenten Pool, was arrested on Friday.
There was no bail application at the short hearing at Prestatyn Magistrates' Court.
Residents were evacuated from their homes on Friday and Saturday after explosive experts searched a house.
Town councillor Mr Larsen is charged with unlawfully causing an explosion likely to endanger life or cause serious injury to property at Denbigh on March 24.
District Judge Andrew Shaw remanded Mr Larsen in custody to appear at Mold Crown Court next Monday.
The councillor represents Central ward on Denbigh Town Council and was mayor of Denbigh in 1999-2000.
Meanwhile a 40-year-old woman who was also arrested has been released on bail pending further inquiries by North Wales Police.
Residents in Lenten Pool had to leave their homes on Friday night and again on Saturday while police and an army bomb disposal unit searched a house.