Ottawa Fire officials say approximately 20 people will be displaced after a blaze broke out in a high-rise apartment building in the Dow’s Lake area.

The fire broke out in a unit on the 11th floor just before 5 p.m. Friday.

Ottawa paramedics say four people were assessed for smoke inhalation.

The building was evacuated and OC Transpo busses were brought in to keep residents warm while firefighters tackled the flames.

The blaze caused an estimated $200,000 in damage.

The cause is under investigation.