On Sept. 18 at 8:48 a.m. ET, an OC Transpo double-decker bus travelling Route 76 north from Barrhaven to downtown Ottawa crossed a level rail crossing and struck Via Rail passenger train 51 travelling west.

In the resulting collision the front end of the bus sheared off, six people were killed and more than 30 people were injured.

It was an incident that shook the community of Barrhaven, the city of Ottawa and prompted a Transportation Safety Board investigation that is expected to take months to complete.

It also prompted questions about the condition of the bus and its driver and the state of rail safety and rail crossings across the country.

Here is a look at the news stories from the incident, in chronological order:

Sept. 18, 2013

Sept. 19, 2013

Sept. 20, 2013

Sept. 23, 2013

Sept. 24, 2013

Sept. 26, 2013