09/07/2012 08:09 EDT | Updated 11/07/2012 05:12 EST

Airport workers in St. John's vote to go on strike; give 72 hours notice

ST. JOHN'S, N.L. - Officials with the St. John's International Airport in Newfoundland say they have received a 72-hour strike notice from unionized workers.

The airport says it is continuing to negotiate with members of the Public Service Alliance of Canada despite the notice that was submitted at 5:30 p.m. Friday.

That puts the 90 maintenance, security and emergency workers in a legal strike position as of 5 p.m. Tuesday.

Union members gave the union a 100 per cent strike mandate in a vote Thursday.

The airport's CEO says airports are considered essential services and management, along with some unionized employees, will try to maintain operations.

The union says the workers have not seen a wage increase in four years and the union has been without a collective agreement since 2009.