Three schoolboys were injured while another in critical condition when their bicycles were knocked down by a car at Jalan Permatang Batu flyover, here, last night.

Seberang Perai Tengah police chief ACP Rusli Mohd Noor said in the 11.20pm incident, a car driven by a 26-year-old woman knocked down the victims who were on three bicycles.

"Mohd Nur Amier Ishak, 13, who sustained serious injuries on his body and head is being treated at Seberang Jaya Hospital and reported to be in critical condition.

"His friend Amirul Haiza Hakimi Abdullah Sani, 14, who sustained a broken leg, is also being treated at the same hospital, but is in stable condition," he said when contacted here today.

He said another two victims Muhammad Nasrul Hisham Muhammad Nazri and Mohd Alif Rosdi, both 11, were being treated at Bukit Mertajam Hospital.

Rusli said the victims were riding their bicycles from Jalan Permatang Rawa to Jalan Permatang Batu when the car coming from Jalan Sungai Rambai knocked them down from behind.