The union representing around 10,000 Air Canada flight attendants has signalled its intent to strike Saturday.

Flight attendants have issued 72-hour strike notice and could walk off the job at 12:58 a.m. ET on Saturday if a deal isn't reached to avoid a work stoppage.

In an update posted online, the union said it has made progress on some items during its contract talks, but has been unable to reach a deal.

The Air Canada component of the Canadian Union of Public Employees said its move was followed by a lockout notice issued by Air Canada.

On Tuesday, Air Canada said it had reached an impasse with the union as the two sides remained far apart in contract talks.

The union has said its main sticking points revolve around what it calls flight attendants' “poverty wages” and unpaid labou

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