ST. JOHN'S, N.L. -- An Air Canada flight headed from St. John's, N.L., to Toronto safely landed Friday after crew reported a mechanical emergency soon after takeoff.

The St. John's International Airport Authority said the plane circled back and returned without incident just before 2:30 p.m.

Airport emergency and local fire crews responded along with regional health officials.

No injuries or need for medical treatment were reported.

Air Canada spokesman Peter Fitzpatrick said the pilot turned around when the landing gear on the Embraer 190 aircraft would not retract.

Fitzpatrick said in an email the cause is under investigation and customers will be moved to different flights to be on their way as quickly as possible.

There were 100 passengers and crew onboard.