An Air Canada jet flying from Toronto to Narita, Japan was forced to turn around shortly after takeoff and make an emergency landing this afternoon after one of its two engines suddenly shut down, and pieces of the plane fell on a suburban neighborhood below.

Flight 001, a Boeing 777 with 318 passengers and 16 crew members on board, took off from Toronto's Pearson International Airport at 2:10 p.m.

Air Canada spokesman Peter Fitzgerald tells ABC News that shortly after take-off, the engine shut down and  it appears that pieces of the engine fell off the plane, crashing into neighboring suburbs.

Fitzgerald could not confirm what exactly fell from the plane, but told ABC News that "the engine did not fall off. It broke."

The metal parts smashed through windshields of parked cars in Mississauga, Ontario, leaving their owners stunned.  Peel Regional Police reportedly received calls of minor property damage, but no injuries were reported.

According to passengers, the captain declared an emergency in the air.  With just one of two engines still running, the jet returned and landed safety at Pearson International Airport shortly before 4 p.m.