Thousands of parents are on alert after several reports of attempted child abductions outside schools in Kingston.
Police are on guard outside every primary and secondary school in the Royal borough when the children arrive and when they leave.
A young boy managed to escape after he was snatched outside a school in Tolworth just after 9am on Monday.
According to police, another incident took place later that day outside a school near to Worcester Park.
Last Thursday, a man and a woman were seen approaching a girl at a water fountain outside a primary school in Surbiton but she ran away.
Headteachers from schools across the area have sent text messages and letters asking parents to be vigilant.
Mothers taking their children to school this morning told London Tonight they were worried but felt safer since police began guarding the school gates.
The hunt is now on for a man in his mid 20s suspected of grabbing the young boy on Monday.
He was wearing a woolly hat, black jumper with a blue shirt underneath and has a tan.
The woman with him was slim with long black hair and was wearing a red hooded top and trousers.