GAINFORD, Alberta (AP) — Firefighters battling a major blaze after a Canadian National tanker train derailed west of Edmonton, Alberta, on Saturday have decided to withdraw and wait for the flames to burn themselves out. No injuries to people or livestock have been reported.

The latest derailment has raised more questions about rail safety that became a major issue after a runaway oil train derailed in a Quebec town in July, triggering explosions that killed 47 people.

Canadian National spokesman Louis-Antoine Paquin said 13 cars — four carrying petroleum crude oil and nine loaded with liquified petroleum gas — came off the tracks around 1 a.m. local time in the hamlet of Gainford, about 50 miles (80 kilometers) from Edmonton. Three cars began leaking and caught fire.