A teacher has been suspended after he was arrested on suspicion of making and possessing indecent images of children.
A Wiltshire Police spokesman confirmed the man, who works at Derry Hill Primary School near Calne, was arrested on Monday morning.
The spokesman said he has been released on police bail pending further inquiries.
The school's head teacher said support was being given to pupils and their families.
A police spokesman said officers were examining a computer that was seized from the man's home.
He added that the investigation was in its early stages.
Sheryl Staton, head teacher at Derry Hill Church Of England Primary School, said in a statement: "The school with the help of Wiltshire Council and Wiltshire Police are making sure pupils and their families are fully supported.
"Our number one priority is to ensure the safety of our children.
"We have met with the parents and urged them to phone the dedicated contact numbers, which have been set up so they can talk to specially trained professionals if they have any concerns or questions.
"Due to the circumstances, we are asking for the school's privacy to be respected so our children can continue learning in as normal an environment as possible.
"As there is an ongoing police investigation, I cannot comment further."
A Wiltshire Council spokesperson said: "Our main concern is the children's welfare and we are working together to ensure that they can continue to learn in a safe environment with as little disruption as possible.
"Parents and guardians are being updated regularly and trained staff are available around the clock to assist families with any questions or concerns they may have."