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The Rail and Maritime Transport Union has withdrawn strike notices for tomorrow and Friday, in the hope they can continue negotiating with the Lyttelton Port.
The 200 union members - about half the port's staff - began a 13-day strike yesterday, after negotiations with the port company broke down over pay and work safety.
Yesterday, union members set up pickets at seven places around Christchurch.
Union organiser John Kerr said the strike notices for tomorrow and Friday have been withdrawn, and hoped the company would return to the negotiating table.
Mr Kerr said workers would also present a letter outlining their concerns to the owners of the port, Christchurch City Holdings, today.
The Lyttelton port company has been approached for comment.