A schoolboy has been arrested after a teacher was allegedly hit in the face by a book.
Police were called to a school in Edinburgh on Thursday following reports of a disturbance.
Officers recovered a knife during a search at the school.
Police Scotland said a 15-year-old was arrested at around 12.35pm on Thursday in connection with a disturbance after a male teacher suffered a minor injury.
A spokeswoman said: "An offensive weapon was discovered during a subsequent search and inquiries are ongoing into this."
A spokesman for Edinburgh City Council said: "The school is cooperating fully with Police Scotland following an incident at the school yesterday."