The Irish Congress of Trade Unions (ICTU) has released a statement over the upcoming Eurovision Song Contest in Israel.
ICTU has said it has had "a long held policy to work at national and international level to pressure Israel to comply with international law."
"The continuing occupation and effective annexation of increasing parts of Palestinian territories by Israel - in contravention of international law - undermines the viability of a future Palestinian State and has made everyday life unimaginably difficult for the Palestinian population."
It said it recognises that, while RTÉ will screen the event, a number of key employees in media may have "conscientious objections about involvement" in the Eurovision Song Contest in Israel.
It added: "Employees should be aware that Congress supports a policy of conscientious objection for workers who may be involved in production and urges all employers to adopt such a policy in this context."
RTÉ's Director-General Dee Forbes has previously said the broadcaster will not sanction any staff member who declines to travel to Israel to cover the event on conscientious grounds.
Musicians and political activists here have joined forces to call for a boycott of the annual song contest.
Critics have said no Irish entry should be sent to Israel, in protest over the occupation of Palestinian territories.
While Sadaka, the Irish-Palestine Alliance, has launched a new campaign featuring a Palestinian boy.
It said it wants to raise awareness about the reality of life for hundreds of Palestinian children - who are detained, interrogated and imprisoned every year.
The group said: "Every year, Israel detains at least 1,000 Palestinian children, some as young as 10 years of age, human rights organisations report.
"In the first few months of 2019, an average of 207 children have been detained monthly.
"At any given time, there are about 270 Palestinian teenagers in Israeli prisons.
"Over 50% of targeted children are arrested in the middle of the night - pulled from their beds, against international law."
The poster campaign is being run on buses and social media.