The union that represents employees at a Maple Leaf Foods plant in Manitoba where 23 people have tested positive for COVID-19 is questioning statements by officials that the virus hasn't been spreading within the workplace.

United Food and Commercial Workers Local 832 president Jeff Traeger says some of the positive cases at the Brandon facility have been among people working the same shift in the same department.

Traeger says the plant should pause operations given how many workers carpool and take public transit to and from work.

Manitoba Chief Medical Officer Brent Roussin says officials have been closely monitoring the Maple Leaf plant, though he says there's nothing to suggest virus spread within the facility.

Roussin says there is a cluster of 64 cases in Brandon, with evidence of some community transmission.

He says imposing stricter regional restrictions is on the table.

Manitoba reported 16 new cases Monday, bringing the provincial total to 558.

The Canadian Press