NEW JERSEY — Authorities are investigating a rash of fires — now thought to be as many as 9 — that broke out in two New Jersey neighborhoods overnight, which police believe to be suspicious.

Emergency responders received calls to multiple fires in two New Jersey communities between 10 p.m. and 1 a.m, including:

A medical office building at 809 North Wood Ave. broke out around 10 p.m.

A home under renovation on the 900 block of Seymour Avenue 30 minutes later.

Dumpsters at the Joseph E. Soehl Middle School on East Henry Street.

Linden firefighters were called back to Center Street Friday morning for the rekindling of a fire. The house under renovation has been burned to the ground.

Both building fires occurred around the same time, fire officials said. Firefighters also responded to a series of small brush fires in the nearby area, two trash fires and a blaze on a grassy area also broke out along East Curtis and West Henry streets, fire officials said.

A neighboring home to the Seymour Avenue blaze was evacuated, displacing two families, including three small children.

No injuries were reported in any of the fires.

There was another fire that broke out at a garage at a house along West 9th Avenue in Roselle, a town nearby Linden. It is uncertain if this blaze was related to the Linden fires.

Authorities are working to get surveillance footage a middle school where one of the dumpster fires took place as well as the medical office building along North Wood Avenue that caught ablaze.

Overall, federal and local authorities tell PIX11's Ayana Harry that they are 9 fire in total currently being investigated: 8 in Linden and 1 in Roselle.

Linden Mayor Derek Armstead is also asking any residents who live in the area with surveillance cameras to contact the police department.

One neighbor told police he spoke to someone acting suspicious right before the North Wood Avenue blaze. No accelerants have been found.

It is unclear if the fires are connected, police said, but they are considered suspicious and under investigation.