Mitrajaya Holdings Bhd's subsidiary Pembinaan Mitrajaya Sdn Bhd and Singapore-listed Raffles Education Corp Ltd's wholly-owned subsidiary Raffles K12 Sdn Bhd have commenced arbitration proceedings against each other at the Asian International Arbitration Centre (AIAC) in Malaysia to seek mediation in a dispute involving Pembinaan Mitrajaya’s role as the contractor for the construction of the Raffles American School within the Nusajaya enclave in Johor Bahru, Johor.