03/11/2015 04:31 EDT | Updated 03/11/2015 05:59 EDT

Toronto Plane Flying Low And Trailing Smoke Part Of Military Exercise

Multiple, separate sightings of plane popped up on Twitter after 4 p.m. Wednesday

A military training exercise had some Toronto residents on edge Wednesday afternoon.

The operations manager at the Oshawa Airport confirmed a Hercules airplane from CFB Trenton was flying low to the ground just east of downtown Toronto for a search and rescue exercise around 4 p.m. Thursday.

Diesel fuel from a plane’s exhaust normally creates a black plume when it burns, said Chris Pearce, but it was likely more visible because the plane was so low to the ground.

Several Torontonians tweeted just after 4 p.m. Wednesday that a plane was flying low over buildings.

One user, Joseph Travers tweeted "a small plane just buzzed our 8 floor office building. The windows rattled."

Another said she saw a trail of smoke behind a low-flying plane flying eastbound. A third reported seeing a plane on fire near Scarborough.

Toronto Fire and Police said they had no reports of a plane in distress.

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