Emergency services were alerted to the incident reportedly involving a former student at Johnstone High School at around 10.45am on Friday.

The three female teachers - aged 34, 48 and 59 - were taken to the Royal Alexandra Hospital in Paisley for treatment.

A 14-year-old pupil was also injured and received medical care.

Sky News understands no weapons were used during the alleged incident.

Police Scotland confirmed a 16-year-old girl has been charged in connection and will be reported to the Scottish Children's Reporter Administration.

A spokesperson for the force said in a statement: "Around 10.45am on Friday, police received a report of a disturbance at a school in the Johnstone area of Renfrewshire.

"Officers attended and four females aged 59, 48, 34 and 14 years were found to have sustained injuries as a result of the incident.

"The three women aged 59, 48 and 34 years were taken to the Royal Alexandra Hospital in Paisley.

"A 16-year-old girl has been charged in connection with the incident and will be reported to the Scottish Children's Reporter Administration."

A Renfrewshire Council spokesperson said: "The school continued to operate as normal and senior staff are providing any support needed to staff and pupils impacted by this incident."