The supermarket Lider of the retailer Walmart is seen in Santiago, Chile, July 10, 2019. REUTERS/Rodrigo Garrido

SANTIAGO (Reuters) - Walmart Chile said on Monday it would resume talks with a union of 17,000 workers who walked off the job last week amid a major push by the global retail giant to automate jobs and slash costs.

The walkout has closed at least one fourth of the approximately 400 stores that Walmart Inc WMT.N operates in Chile. Striking workers carrying protest signs have blocked access to many stores around Santiago.

The company said in a statement that it hoped to continue with constructive dialogue but said it also worried about “the illegal blockades of outlets that have occurred throughout the strike.”

Lider’s Inter-Company Union (SIL) could not immediately be reached for comment.

Union leaders said the key sticking point was a salary increase. As automation in stores has increasingly replaced workers, workers say they are forced to juggle more tasks among fewer employees. They have demanded the company boost salaries by 4 percent. Walmart Chile has offered 3 percent, the union has said.

The strike has primarily affected Walmart stores under the franchise SuperBodega aCuenta, and, to a lesser extent, Express, Lider and Ekono.