An elderly New Jersey garbage man was killed when the truck he was riding on went over a speed bump and he fell off, authorities say.

Ismael Oliva, 74, was standing on a platform on the back of a truck on Henry Street in Scotch Plains in Union County around 9:20 a.m. Sept. 2 when the tragedy occurred, Patch.com said.

Oliva fatally hit his head and was pronounced dead at a Summit hospital.

The incident is still under investigation, cops said.