Police were called to a south London school after pupils hurled eggs and flour at each other on their last day.
Year 11 leavers at Church of England St Andrew's High School in Croydon were sent home early on their "muck-up day" after throwing water bombs on the premises.
But as they left some took their antics to nearby streets, where they threw eggs and flour at each other, head teacher Kerry Targett said.
She told the Evening Standard: “Year 11s as we all know have the tradition of muck-up day and our students have clearly seen that happen in years past and wanted to be part of it.
“For some it got a little bit silly with water being thrown inside the school so we decided to send the children home earlier than expected.
“There were a small number that unfortunately decided that they wanted to cover themselves in flour and go out onto the streets.”
A Met Police spokesman said they were called several times on Monday morning about incidents happening around the school.
The spokesman added: “We were called to reports of a fight involving a large number of people.
“Officers attended the incident at Duppas Hill in Croydon. When we attended there were no signs of any offences or any offences committed.”
Mrs Targett added that the school called local police as a preventative measure and she did not see any fighting taking place.
She said: “We just called our local 101 to drive through and have a quiet word about safety and ask them to go home.
“Some of the students I think had eggs on them, it was all about eggs, flour and water.
“There was no fighting at all, a few of the children were blocking the pavements and they were covered in flour and water but I’m sure there was no fighting.
“We wrote to parents expressing our disappointment in some of their behaviours.
“All the students have been back on the site to do their exams and we’ve had no repercussions on site.”
The school in Waddon, Croydon, was forced to shut down its sixth-form level last year, blaming poor academic results.
MORE ABOUT