VERNON - Authorities in Sussex County are investigating how two developmentally disabled children were left alone on a hot bus in Vernon.

Dylan, 9, and another 7-year old student were left unattended on the bus without air conditioning.

Dylan's father, who did not want to reveal his identity, says the bus company MacNova never gave him a clear explanation as to what happened.

"It was hot out yesterday. It was 90 degrees," he says. "And in the bus it can get even hotter... My son got home an hour and seven minutes late- pretty thirsty and dehydrated." 

The father says his son is unable to communicate with others.

Superintendent Dr. Charles Maranzano says the district could not get in touch with the bus company or the driver right away.  When they finally did, the district was told the kids were never left unattended and were on an air-conditioned bus the entire time. Maranzano says he later found out that wasn't the case at all.  

"We have an adult or two acting incredibly irresponsibly and that is totally unacceptable," Maranzano says. 

It's still not clear how long the kids were left alone. "I am so outraged that a bus driver would or could leave children alone on a bus," Maranzano says.

The superintendent says he wants criminal charges filed against the driver.  Police and prosecutors are investigating and reviewing surveillance video from inside the bus.

No one answered at the home of MacNova's owners. Vernon Schools has severed ties with the company.

Both students are doing fine.