Four people remain unaccounted after a fire engulfed a series of adjoining homes in downtown Oshawa Monday (March 22) morning.

While few details have been released, the fire appears to have broken out on Olive Avenue shortly before 1 a.m. and quickly spread.

A social media post from Oshawa Fire Services around 3 a.m. noted that five people had been taken to hospital and crews were searching for four others.

Olive Avenue remains closed between Simcoe and Ritson roads.

Check back for more information as it becomes available.

Photo courtesy of Oshawa Fire Services (Twitter)