Canada ships grain, fertilizer and commodities by rail, and stoppage could cause daily losses of CAD$1 billion.
Brazilian President Luiz Inacio Lula da Silva decries ‘sad news’ and offers condolences to families of victims.
A growing number of airports are imposing restrictions on these electric suitcases over safety concerns.
Probe ongoing into attack on high-speed train network which disrupted busiest lines on Paris Olympics opening day.