The Transportation Safety Board of Canada is investigating after a collision and derailment of a Canadian Pacific Railway train on tracks running through The Annex neighbourhood.

The train derailed on tracks near Spadina Road and Dupont Street at around 5:45 a.m.

The TSB said two trains travelling in opposite direction side-swiped one another near Howland Avenue and Dupont Street.

There were no injuries reported and no dangerous cargo was spilled, however there was a small diesel spill following the collision, the TSB said.

Minister of Transport Marc Garneau confirmed Sunday that 1,200 litres of diesel was spilled following the derailment.

“CP takes this incident extremely seriously,” the company said in an email. “CP immediately enacted our emergency response processes to deploy teams and assets to the site.”

The company said preliminary indications are that the incident was a result of human error.

CP, Toronto police and the TSB are investigating.

TSB spokesperson Chris Krepski told CTV Toronto that dangerous items on board the derailed cars include non-flammable gases under pressure, compressed nitrogen, aerosol containers, west-cell batteries and some alcoholic beverages.

Bartlett Avenue is closed north of Dupont Street so that equipment can be brought onto the tracks to remove the train.

Speaking to CP24 Sunday, Ward 19 councillor Mike Layton said the possibility of a derailment has been a big concern for residents in the neighbourhood over the years.

"Local residents and local councillors for several years now have been calling on the federal government to put in place stronger protections for the residents that live in very close proximity to the route here and this is what they feared," he said.

"We are fortunate in that no one was injured at the scene in the surrounding neighbourhood or those on the vehicle but we have to ask questions about whether or not what’s being moved on these lines is safe to be moving through these neighbourhood and are all precautions being taken in order to protect the community." 

Layton said a town hall recently held on the subject was attended by both members of the community and federal officials.

"We have been articulating our concerns. We haven’t yet gotten the solutions," he added.