President of the Industrial, General and Sanitation Workers Union Robert Benacia, and OWTU's Chief Education and Research Officer Ozzi Warwick hold up signs prior to Friday morning's union march through Port-of-Spain.
The unions, representing public sector workers, are protesting the Chief Personnel Officer Commander Daryl Dindial's offer of a salary increase of 2% over eight years.
The offer was rejected by several unions on Thursday. They called the offer disrespectful and insufficient.