Police said the incident, which involved a Audi A4, happened near the Craigend junction on Friday.
The largest haul, more than £8m of cocaine, was discovered during a warrant in Bellshill on 11 December.
Kilgraston School in Bridge of Earn had launched a £2m fundraising campaign last year after a previous threat of closure.
Kilgraston School in Bridge of Earn had been set to close this month, citing financial difficulties.
Kilgraston School, which employs 116 people, said loss of income from Covid lockdowns was a factor.
Davina Bisset lost her job and has been fined over the incident at a Perthshire care home.
The Lancashire couple were knocked off their tandem by a car as they travelled through Perthshire.
The couple were knocked off their tandem by a car as they travelled through Perthshire.
