Three fires were reported in Linden and one in Roselle between Thursday night and Friday morning.
First, a doctor's office on North Wood Avenue caught fire at around 10 p.m. Thursday.
Then a home under renovation on Seymour Avenue went up just after 10:30 p.m. Firefighters returned to the scene Friday morning to put out some hot spots. Fortunately, no one lived in the house.
In the third case, dumpsters at the Joseph E. Soehl Middle School on Henry Street were reported on fire just after 12:15 a.m. Friday. Officials said there were also a few small brush fires in the area.
Finally, a detached garage behind a house in Roselle burned down. Two vehicles were also damaged. Investigators are looking into whether this fire could be connected to the others.
"We had three fires here in Linden alone. At this time, we don't know the cause. Our investigators are trying to determine what was the cause of the fires. I'm sure they will determine that," said Derek Armstead, mayor of Linden. "We had another fire in Roselle. It proved to be a very challenging night for our firefighters and our first responders. Somehow, we will figure it all out."
So far, no arrests have been made, but the timing of the fires makes them suspicious. All are under investigation.
Armstead had harsh words for the person or people responsible for these fires.
"Beware. We will do everything humanly possible to catch you. And if we catch you, you will be prosecuted to the fullest," he said.
The mayor added that officials are taking these suspected arsons very seriously.
"Anytime you have events like this you should be concerned. If there is a guy out there or persons out there who are involved in arsons, yes we should be concerned, and treat this as if our lives depend on it, because they certainly could," Armstead said.
Anyone with information about these incidents is urged to contact Linden Police Detective Matt Jones or Tim Hubert at (908) 474-8537.
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