(Reuters) -A Union Pacific Railroad train derailed two miles east of Gordon, Texas, on Tuesday, the company said, and emergency responders said the derailed cars did not appear to be leaking their contents.

The emergency responders in Palo Pinto County said that, nonetheless, the derailment was "being treated as a HazMat situation."

"At about 2 p.m. CDT today, approximately 35 Union Pacific cars derailed," the company said in a statement.

It was not clear what caused the derailment just outside Gordon, a town with a population of 460 located about 95 miles (153 kilometers) west of Dallas.

The company did not immediately respond to a request for comment on what materials were being carried in the derailed cars.

Officials with the Palo Pinto County Emergency Services District 1 said the derailment had sparked some small grass fires, which firefighters were working to control.

"At this time, there are no confirmed hazardous material leaks," the emergency officials wrote on social media.

They said that nobody was hurt in the incident and all railroad personnel had been accounted for.

The railroad said additional crews were in transit and an incident investigation was underway.

(Reporting by Abhinav Parmar and Mrinmay Dey in Bengaluru and Brad Brooks in Colorado; Editing by Sriraj Kalluvila and Leslie Adler)