NI Strikes: Varadkar says public sector workers haven't got pay increases 'they should have'
Some 16 trade unions with joint membership totalling around 170,000 are taking part in industrial action today.
Unions in the North have been involved in long-running pay disputes, in some cases lasting for several years.
Workers are demanding that pay awards made to counterparts elsewhere in the UK are introduced in Northern Ireland.
Speaking at Belfast City Hall this afternoon, Nipsa general secretary Carmel Gates said strike action will grow if demands aren't met.