More than 6,000 people are expected to march through Belfast on Saturday to demonstrate their opposition to racism.
The march is being organised by the Irish Congress of Trade Unions (ICTU) in reaction to a spate of racists attacks in Northern Ireland.
In the first six weeks of 2004, PSNI figures show more than 320 racially motivated incidents were reported in the North, said ICTU's Ms Clare Moore.
Yesterday, PSNI detectives were trying to determine if a Indian married father (38) of two, who died as a result of a beating in Co Derry at the weekend, was the victim of a racist attack.
The police, who were questioning two men last night, have begun a murder inquiry into the death of Mr Brij Sharma, who died on Tuesday from injuries he sustained when he was attacked in Moneymore early on Sunday.
"The May Day march is the biggest trade union march on these islands and this year it will be a demonstration of our complete opposition to such attacks and a strong celebration of the growing diversity in our community," said Ms Moore
The march will be preceded by a rally at the College of Art Gardens at 12 noon. There will be short speeches by trade unionists and members of minority ethnic communities, including the President of the Belfast Islamic Centre, Mr Jamal Iweida.