The headteacher of a Junior School close to where a Saudi-Arabian student was stabbed to death, has asked parents not to let their children walk to and from school alone.
Nahid Almanea, who was 31, was found on a footpath near Avon Way in Colchester after she had been stabbed 16 times.
Detectives have released CCTV footage showing her in the moments before she was attacked.
A 52-year-old man who was arrested has now been eliminated from their inquiries.
"We sent a text message through parent mail, and an e-mail, telling our parents to make sure that their children were safe and supervised coming to and from school," Melody Lowe, the Head teacher at St Andrew's Junior School told ITV News Anglia.
"Our infant children travel with parents, but some of our older junior children travel independently so we felt it was important to acknowledge the disappointing and shocking incident, however the parents have the responsibility to bring the children to school safely."
Click below to hear from Melody Lowe
CCTV images of potential witnesses to the savage murder of an Essex student have been released by police today.
Detectives investigating the murder of Nahid Almanea have issued an efit of a man they would like to speak to.