Ottawa city bus that caught fire was 'sluggish' before blaze started

A double-decker OC Transpo bus that caught fire in rural Ottawa Tuesday morning with 70 to 80 passengers on board was performing sluggishly just before the blaze, and had been involved in a crash in 2013.

The firehappened on Piperville Road, between Anderson Road and Farmers Wayin southeast Ottawa, atabout 6:50 a.m. ET.

The bus was servicing Route 222,heading east along Piperville from the community ofVars to downtown Ottawa.

While drivingthe routethe bus operator noticed the bus was "sluggish," and called OC Transpo'stransit control centre to report it, according to Troy Charter, OCTranspo'sdirector of transit operations.

The driver was told to pull over in a safe area and check it out, but saw nothing when he walked aroundthe bus, Charter said at a news conference Tuesday afternoon.

After getting back on the bus, everyone heard a loud "bang, or a pop," Charter said, followed by the appearance of smoke and flames.

Everyone made it out safely.

Bus involved in previous incident

The same bus, No. 8010, was involved in a crash in April 2013.

It was heading south along Woodroffe Avenuewhen it went off the road in icy, slushy, windy conditions and slammedinto a hydro pole,knocking out power to thousands of people.

The driver wasthe only person inside. Hewasn't injured.

"The bus has been in service then, reliably in service since then," Charter said. "I don't have any indication to think it is related, but I don't want to speculate, either. It's too early to tell at this point."

A "thorough root cause analysis" will be performed in the coming days, he added.

The bus was purchased in 2012, Charter said.It'sone of 117double-deckerbuses that each cost nearly $1 millionand were manufactured by Alexander Dennis, a company based in Scotland.

'Heard an explosion'

Passenger Ewa Roy told CBC News people heard a loud noise and started seeing smoke after the bus pulled over early Tuesday morning.

"We heard an explosion, and we assumed that it was a tire that exploded. And then there was some smoke that started coming out from the back end of the bus," she told Radio-Canada in an interview later Tuesday morning.

"And we all came out very calmly, everybody was very calm. We were surprised when the explosion happened, but then after that we all just calmly left the bus and ended up in the parking lot of the park and ride.

"There was a lot of smoke at first, and then the flames started. Firemen came within maybe 15 minutes, then the other bus came around 25 minutes later and picked everyone up."

The drama was mainly visual, she said.

"It is a little bit scary at first, but we were fine, everybody was fine, and that's what matters, really. Everyone's safe. I commend the bus drivers and my [fellow passengers]. Everybody kept calm and it was all right," Roy said.

No one injured

The bus driver used a fire extinguisher but wasn't able to suppress the flames, Charter said, adding that he did everything he was supposed to.

By the time Ottawa firefighters arrived,the bus was engulfed in flames. It took about 10 minutes to get the fire under control, according to the fire department.

No one was injured.

PipervilleRoad wasclosed from Andersonto Farmers Way but has since reopened.