AN INVESTIGATION has been launched after a second fire broke out at an electricity sub-station near Cottingham.
Crews spent hours tackling the inferno in an electrical transformer at Creyke Beck in Park Lane on Friday.
They were then called out a second time, two days later, after internal parts of the transformer were reignited on Sunday, at about 12.10am.
Neighbours spoke of their shock after hearing the initial "explosion" before the weekend as plumes of black smoke drifted across East Yorkshire.
The site is immediately next to the home of East Riding Council leader Stephen Parnaby, who said neighbours are annoyed they have not been updated by National Grid.
He said: "Luckily, nobody was hurt, but there is still quite a lot of activity at the sub-station and a knock on the door or a leaflet through the letter box would have put people's minds at rest."
Councillor Parnaby runs a caravan storage company near the site.
He said: "It puts doubt in your mind because you presume somebody, somewhere, must know what's going on.
"We haven't heard anything from National Grid and some neighbours were really concerned.
"One elderly lady I spoke to recently was still quite shaken.
"You would anticipate at least some sort of communication, obviously there are bridges that need to be built with National Grid."
A spokesman for Humberside Fire and Rescue Service said they could not speculate as to the cause of the fire and it could take weeks before they come to a conclusion.
The fire involved 100,000 litres of mineral oil and crews from six fire engines were called to the scene near Dunswell Road, north of Cottingham, on Friday.
A spokesman for the National Grid, which operates the facility, said: "Now the blaze has been extinguished, we'll be investigating the cause of the fire, which started on a transformer at the sub-station.
"A transformer is a piece of equipment that reduces the voltages of the electricity that passes through the sub- station, from the high voltage National Grid electricity transmission system, into the lower-voltage distribution network.
"It will be replaced but I cannot put a value on the cost of this because of commercial sensitivities and we don't yet have a schedule for the work to replace it.
"Electricity supplies to homes and businesses won't be affected by work to replace it and we do have workmen on site clearing up after the operations that took place over the weekend."
The National Grid had staff maintaining a fire watch at the sub-station throughout the weekend and confirmed there was a "very minor reignition" in the early hours of Sunday morning and the fire brigade were called out.
She said: "This was quickly brought under control.
"The metal housing of the transformer has now cooled down and a further reignition is extremely unlikely."
