Cereal maker Sanitarium has indefinitely suspended Weet-Bix manufacturing operations at its Christchurch factory as a result of damage the facility sustained in the February 22 earthquake.
General manager Pierre van Heerden said 36 staff at the plant had been offered redundancies as the result of the closure.
More than 60 staff were sent home on full pay late last year when manufacturing was suspended, and since then the company has been running its Auckland plant overtime to supply the South Island with Weet-Bix.
The firm said the decision to indefinitely halt operations was made after the company received an engineering report on the buildings last week.
"After numerous discussions with our engineers, insurers and Cera, it has become clear that as a result of the February 2011 earthquake the tower block [used to make Weet-Bix] has been damaged to an extent that it puts staff safety at risk," van Heerden said.