GO Transit says the service suspension will last about two hours.
Peel Regional Police were called to a report that a person was struck on the tracks at Stanfield Road at 7:20 a.m.
Passengers are advised to use the Lakeshore West Line and passengers may also use their GO fare to board the TTC at Kipling or Islington station.
The following trains are affected:
The Milton 06:43 - Union 07:40 train trip is holding indefinitely west of Dixie.
- The Milton 07:13 — Union 08:13 train trip is holding indefinitely at Lisgar.
- The Milton 07:23 — Union 08:23 train trip is holding indefinitely at Milton.