JOHOR BARU - About 22 people including school students and senior citizens were injured by a lone assailant who attacked them with bottles and a helmet.
In some cases, the man who wore a helmet, even splashed vinegar and diesel before fleeing the scene.
The latest cases happened on Thursday when a 14-year-old student who was walking to her school was attacked with a bottle at 7am while another woman, in her 70s, was attacked with a helmet.
Both victims suffered injuries to their head.
All the cases happened around Taman Johor Jaya and Taman Desa Cemerlang.
Johor Baru Municipal Council councillor Tan Tuan Peng said the incidents started in April and up to July 30 and based on the victim's description, the suspect usually rides a motorcycle and surprises his victims from the back before fleeing.
"None of the victims could recognise the suspect and we believe there could be more than one person doing this," he said yesterday.
Tan also said that so far there was no motive for the attacks as none of the victims were robbed.
The victim's mother Chew Shuh Yuan, 43, said her daughter Tan Xin Ping, 14, was hit on the head with a bottle while her daughter was walking to school one morning.
"My daughter was walking alone towards SMK Johor Jaya 2 which is only 1km away from our house.
"Her head was injured and required five stitches," she said.
Chew also said that since the incident, her second daughter was traumatised and afraid to go out alone and she even refused to go to school if no one would send her.