Some 850 workers have gone on strike at Carlsberg's largest domestic brewery in protest at new pay proposals.

Carlsberg is renegotiating its pay deal with employees at its Fredericia plant, which the Danish brewer intends to expand amid plans to close a site in Copenhagen.

In February, Carlsberg announced that it would close its brewery in the Danish capital as it looked to drive efficiency across Western Europe.

As part of the move, Carlsberg said its Fredericia brewery would receive DKK800m (US$135.9m) of investment over the next three years to upgrade and boost capacity at the site by up to 70%.

A spokesman for Carlsberg Denmark said the brewer wanted to strike one pay agreement for its employees at the site to replace the three separate deals for workers in brewing, soft drinks production and logistics.

However, the spokesman told just-drinks today (8 September) that the workers wanted to keep the existing pay structure. To have three pay deals was "very, very expensive", he said.

"(The workers' demands) are far above what we think is reasonable to pay," he added.

The spokesman said the workers would re-start work on Sunday and that the strike had only had a "small impact" on production.