Detectives investigating the arson at Millais School in Horsham on Thursday March 20 have arrested a 16-year-old girl on suspicion of arson with intent to endanger life.
The girl was arrested on Sunday March 23 and was subsequently interviewed and bailed.
As a result of further information the same girl was re-arrested this morning (March 24) and she will be interviewed.
Chief inspector Howard Hodges, Horsham district commander, said: “This investigation remains focussed on establishing the sequence of events that led to the fire at Millais School. I want to reassure the pupils, parents, school and wider Horsham communities that this investigation will establish the truth of what happened that day.
“We continue to work closely with the school to ensure that our investigation compliments the significant efforts that the school is making to return to normality at the earliest opportunity.
“It is important that the investigation is allowed to progress and I would ask that rumour and speculation via social media or other avenues - whilst understandable in the circumstances - are avoided to ensure the integrity of our investigation.
“I would like to appeal again to anyone with information that may help us in our investigation to contact police 101, email 101@sussex.pnn.police.uk or call the independent charity Crimestoppers anonymously on 0800 555 111. “