(Adds union official's comment, background on incident)
TORONTO, Aug 9 (Reuters) - Agrium Inc's AGU.TO operations at its Vanscoy potash mine in the province of Saskatchewan could be halted for days, a union official said on Tuesday, the day after a worker was injured.
An Agrium spokesman said in a statement that the company was working on a plan to restart the western Canadian facility and did not expect any "material disruption." Agrium gave no timeline for resuming operations at the mine.
A worker was injured Monday and is in critical condition in the hospital, said Darrin Kruger, president of United Steel Workers union's Local 7552 division. said the incident was under investigation by a provincial workplace safety body and that the facility was expected to reopen after that concludes.
A Saskatchewan spokeswoman said the province does not comment on open investigations and has no standard timeline for them.