It's over recent Census results, which showed a decline in the number of Welsh speakers.
The Welsh Government say the building remains open to staff and visitors as usual.
Cymdeithas are holding a peaceful protest at one of the entrances at the Welsh Government offices in Cardiff. The main reception remains open as usual to all staff and visitors.
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Turing increasingly cloudy from the west this afternoon. Winds strengthening too. Patchy rain and strong winds overnight.
David Cameron and Nick Clegg have unveiled proposals for a range of new powers for the Welsh Government and National Assembly.
Window cleaner Gavin Tainton tied up the 88 year-old woman with electric wire and left her for dead at her home where she lived alone.