A shopping mall in St. Thomas, Ont., was evacuated Saturday morning amid fears of a partial roof collapse.

The Elgin Mall was closed as a precaution after reports that a portion of the roof was sagging, police said. The sagging section of roof surrounded a skylight over the mall's food court.

St. Thomas Police stopped short of labelling the incident a collapse.

About 90 per cent of the mall's stores have since re-opened; two stores remain closed pending further inspection.

A grocery store attached to the mall was permitted to remain open.

No one was injured, police said.

Elgin Mall is a single-storey shopping mall in St. Thomas, a town of about 38,000 in Southwestern Ontario.

The mall's manager says the collapse was caused by water damage from a heavy storm Friday evening.