The elderly man's legs were severely injured, with both of them likely to be broken, witnesses said.
He was conveyed unconscious to the hospital, where he subsequently passed away, police said.
The boy was reportedly playing behind the vehicle, and the teacher failed to spot him.
The otters later ran off to a nearby park.
The neighbours have a strained relationship, with a long history of arguments.
The Secretary General/CEO of SRC has described the situation as "dire".
The youths were seen smiling at passers-by.
The man was also charged with verbally abusing an air stewardess.
Viewers flooded his live chat with desperate messages, urging someone to “save him”.
A boy who was with her can be seen trying to stop her at certain points.