A child migrant row has erupted over claims a “30-year-old man” is being taught in a secondary school alongside children.

Photographs which claim to be of the pupil with facial stubble have been posted on social media, prompting some parents to threaten to remove their children from the Suffolk school unless his “real” age is established.

The Year 11 pupil, said to be 15 and originally from Iran, started at Stoke High School, Ipswich, in September having arrived in the UK unaccompanied earlier this year. A school pupil posted a picture on Snapchat of his new GCSE classmate asking: “How’s there a 30-year-old man in our maths class?”

After parents expressed concern that an adult could be mixing with the academy’s 680-pupils the school contacted the Home Office. A Home Office source said it was investigating the claims.

One mother, whose son is in the same year as the migrant student, said: “Parents have been pulling their children out of school left, right and centre.

“Looking at photos of this man, he is clearly older than 30. How can someone like this be eating with children, changing with children and learning with our children while pretending to be a teenager?

“He could be harmless but he could also be a dangerous man. I am terrified to think what would happen if he started a relationship with a young girl who thought he was her age.”