Buildings were evacuated and roads were temporarily closed after an underground fire in Glens Falls. It happened around 7 a.m. near Centennial Circle. Our Brooke Selby has the latest.

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GLENS FALLS, N.Y. -- An underground fire in Glens Falls forces road closures and building evacuations. It happened around 6:30 a.m. Thursday beneath Ridge Street near Centennial Circle.

Emergency crews believe a transformer exploded causing the electrical fire. Two manhole covers became dislodged as a result. National Grid is looking into what caused the explosion.

This is the fourth underground fire in the region within the last few weeks, but National Grid says they are not related.

National Grid Spokesperson Patrick Stella said, "All these incidents that we've seen we checked all the nearby manholes as a precautionary measure while we're there to make sure there's no other burning cable or cable that looks like it needs replacing. There's a lot of factors that we see in all these incidents. Like I said, they're all separate instances and they're being treated that way."

There are no reports of any injuries.