People Before Profit TD Paul Murphy has been freed after being detained again by Egyptian authorities while trying to retrieve his phone from a Cairo police station.
His partner earlier urged Tánaiste and Minister for Foreign Affairs Simon Harris to intervene in the case.
The Dublin South West TD had been detained on Friday while attempting to march to the Rafah crossing into Gaza as part of a large demonstration to deliver aid into the blockaded enclave.
He was one of a number of Irish people who were expected to take part in the march.
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Mr Murphy said his phone and passport were confiscated before he and others were put on a bus to Cairo airport, where they believed they would be deported.
All Irish people who were detained were then released but some did not have their phones returned.
On Monday, Mr Murphy went to a police station in the Egyptian capital to retrieve his phone.
People Before Profit said this was done on the advice of the Irish embassy.
He then sent messages from the station that he was concerned that his passport had been taken again and was told he could not leave.
He then attempted to leave, but the party said he and others were prevented from doing so.
“I have been detained in the Abdeen police station in Cairo,” the party quoted Mr Murphy as saying. “On the advice of the Irish embassy, I went to the station at 12.30pm Egyptian time to inquire about my phone that they took.
“They took my passport again, had me talk to the secret police and left me in a room with an interpreter. They claim they are looking for my phone.
“I just attempted to leave but they said that I cannot leave. I understand that other march participants have also been detained.”
People Before Profit said after 8pm Irish time that Mr Murphy had been released with his passport and is to “fly out” on Tuesday morning.
Mr Murphy’s partner and Dublin councillor Jess Spear had earlier appealed for the Government to intervene.
“I appeal to Tánaiste Simon Harris to intervene urgently with the Egyptian authorities,” she said.
“The Tánaiste must ensure that Paul and all the Global March to Gaza participants are released, have their passports returned and are allowed to continue their humanitarian mission to try and get aid to the people of Gaza.”
The Department of Foreign Affairs and Trade confirmed it is providing consular assistance in this case.
The Global March to Gaza is a civilian movement that aims to march from Egypt to Gaza to deliver humanitarian aid and increase pressure so that vital supplies to the besieged region are unblocked.
A blockade on Gaza was imposed by Israel when it ended a ceasefire with Hamas earlier this year.
This has deepened fears of famine, while a new Israeli-US aid system has been marred by violence.
It comes as Israel’s 20-month military campaign in Gaza continues, during which an estimated 55,000 Palestinians have been killed.
Israel launched a military offensive in Gaza after Hamas-led militants killed about 1,200 people and abducted 251 hostages on October 7th, 2023.