A massive sinkhole is under supervision as it has been swallowing up equipment and vehicles since surfacing outside Daisetta in southeast Texas.

No human casualties or damaged homes have been reported.

Investigators with the Texas Railroad Commission were checking pipelines in the area and trying to determine if any regulations have been violated, said agency spokeswoman Ramona Nye, according to FOXnews.

So far, no pollutants have been detected, as officials with Texas Natural Resources and Conservation were monitoring air and water quality.

“Right now we’re not concerned about any kind of explosion or any kind of hazard. We are monitoring some other things around the area to make sure everyone’s OK,” said Tom Branch, coordinator of the Liberty County Office of Emergency Management. The hole gets bigger and bigger and no one is really sure why.

“The road that drives out into the oil field, there’s more cracks showing up in that so we’re just trying to take every precaution and get people back ‘cause we don’t know exactly what’s going to happen with it, said Hugh Bishop with the Liberty County Sheriff's Department as a local source reported (KVUE).

Television news footage showed a tractor, some oil field equipment and some telephone poles falling into the sinkhole. The sinkhole has supposedly grown to at least 600 feet long and 200 feet deep by Wednesday night.

Officials say that the cause may be the fact that Daisetta sits on a salt dome, one of the most common types of traps for oil and that the salt dome collapsed causing the ground to cave in.