HARTFORD, Connecticut, May 9, 2008 (NBC) -- Charges may be filed against a school bus driver after a child fell from a moving bus window in Avon, Connecticut.

The second grade student fell from the window of a Dattco school bus Tuesday afternoon and the bus driver kept going, police said.

The child was not injured.

Police lieutenant Christina Barrow said the driver apparently drove too far after a 7-year-old opened an emergency window.

Dattco said it is cooperating with the police investigation.

According to police a warning siren went off when the window opened, but the driver was not sure what happened, and only stopped after a couple of students ran to the front of the bus to tell him the boy had fallen out.

The driver stopped a little bit down the road after realizing what had occurred, police said.

Dattco said they took the driver off the road with pay.

Cliff Gibson, the company's spokesman, said he has never heard of this happening before but "it doesn't matter that it hasn't happened before. What matters is it doesn't happen again."

Police said they would not release the name of the driver until charges are filed.

Dattco said he is a good and experienced school bus driver.