The unidentified siblings, a 5-year-old boy and 11-year-old girl, had been living on the property outside Splendora, a town north of Houston, since at least 2009, according to WFAA 8 News.
Their parents were found guilty last year in a scheme to embezzle money from victims of Hurricane Ike in 2008, and sent to federal prison, officials said.
An aunt was left to take care of the two kids, who were
"Whether she was there or not, they were being unsupervised for extended periods. It's not acceptable," said Jamie Nash with the Montgomery County Precinct 4 Constable's Office.
The dilapidated bus in the heavily wooded property was converted into a make-shift home, according to the Chronicle. It had a window-mounted air conditioner, television, and bunk beds.
"Their living conditions did seem quite deplorable," Montgomery County Precinct 4 Constable Rowdy Hayden told WFAA 8 News.
Neighbors sometimes helped give
"Our investigation has just started," said CPS spokesperson Gwen Carter, KTRK 13 News reported. "We are trying to make sure the kids are safe and trying to understand what family members there are in the community who they know, and what's going on with the family."