The Full Factory Winnerswear Senior Manx Grand Prix was halted by a red flag on Friday.
The red flag was displayed following separate incidents at the 11th Milestone and Bishopscourt.
The incident at the 11th Milestone involved three riders. A further rider was involved in the incident at Bishops Court. The riders injured were taken to Noble's Hospital by airmed helicopter.
The result was taken on positions at the end of the second lap. Andrew Soar was leading at that point and was credited with the win. Michael Moulai and Rob Hodson took the remaining podium positions.
It was announced that the MGP Riders Reunion Parade would not go ahead.
Edited to add: Although initially reported as Bishopscourt the incident happened at Alpine Cottage