ExxonMobil has announced that its ethylene plant at Mossmorran, Fife, will close in February.
The Deputy First Minister is to host a summit on future support for workers after visiting a threatened chemical plant.
Kate Forbes will visit the ExxonMobil ethylene plant at Mossmorran, Fife, on Tuesday.
The visit comes as hundreds of staff face losing their jobs after the petrochemical company announced plans to close the site in February.
ExxonMobil has said the plant does not have a competitive future in the current economic and and policy environment.
Ms Forbes said the summit will be an opportunity to explore how to ensure everything possible is being done to support workers and secure a future for the site.
ExxonMobil, the unions GMB and Unite, Scottish Enterprise, the UK Government,

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