CN Rail says safety is its top priority, as train serviceresumes following a derailment on the edge of a suburban residential area northeast of Montreal. Repentigny, Que., Mayor Nicolas Dufour says that while many residents feel reassured by the work being carried out, others still have safety concerns. Though no dangerous materials were spilled and no one was injured, 49 rail cars went off the tracks near homes along the railway at around 5 p.m. Sunday.