The American Airlines Boeing 737 out of Dallas ran off the runway at Trudeau Airport around 8 p.m. Tuesday night.

A total of 111 passengers were on board the plane, but no one was injured.

Montreal traveller Paul Lavallee said the plane was shaking and he could see mud flying up to the sides of the plane after it rolled into the grass.

Beaconsfield resident Annemarie Rogers said no one fell out of their seats, but passengers had to brace themselves by holding on to the seats in front of them.

The plane remained on the runway with passengers inside until about 9:50 p.m.

The airplane was not seriously damaged.

The cause of the incident is unknown, said Aeroports de Montreal spokesperson Anne Marcotte.

The Transportation Safety Board of Canada is investigating.