A 74-year-old woman, who was arrested in Belfast for wearing a T-shirt expressing support for the banned organisation Palestine Action, has been released from police custody.
She was detained during an anti-racism rally in the city yesterday.
Police said she had been released pending a report to the Public Prosecution Service.
Videos posted online showed police officers in Belfast telling the woman she was being detained under anti-terrorism legislation for wearing the T-shirt in support of the organisation.
It read: "We are all Palestine Action".
In a video an officer is heard telling the woman she is being arrested under Article 13 of the Terrorism Act for "possession of an article namely a sign on a T-shirt that indicates support for Palestine Action."
The woman offers passive resistance to her arrest.
Several officers then lift, carry and drag her to a waiting police van which is driven off.
In a statement the PSNI said: "A 74-year-old woman arrested on suspicion of possession of an article that indicates support for a proscribed organisation in the Linenhall Street area of Belfast on Saturday 9 August has been released pending a report to the public prosecution service."
The woman's arrest was criticised by politicians and human rights activists.
Northern Ireland Director of Amnesty UK Patrick Corrigan criticised the police, describing the woman's arrest as "outrageous".
"Peaceful protest is a basic human right. Many people are justifiably angered by the ongoing genocide in Gaza and are concerned about UK complicity. Under international human rights law, they have every right to voice their concerns.
"The individual who joined a Refugees Welcome rally in Belfast was not promoting violence, and it is wholly disproportionate for the PSNI to treat her as a terrorist.
"UK terrorism laws pose a serious risk to free expression. Rather than targeting peaceful protesters, the government should be taking swift and decisive measures to end Israel's genocide."
Sinn Féin MLA Pat Sheehan said an attempt was being made to criminalise people who chose to stand against the war in Gaza.
"The British government's attempts to criminalise the Palestinian solidarity movement, and the subsequent actions of the PSNI in enforcing this draconian legislation, have been disgraceful.
"While Keir Starmer continues to enable the ongoing Israeli genocide and starvation of Gazans, he is also moving to silence ordinary, decent people for speaking out."
Meanwhile in Derry yesterday, some of those who attended an anti-war protest in the city also flouted the law, displaying posters in support of Palestine Action.
They said it was ironic that they could be criminalised for holding a poster, when the international community was failing to prevent a genocide in Gaza.
In July, Palestine Action was added to a list of groups banned under UK terror legislation, which also covers Northern Ireland.
MPs voted to ban the group after members broke into RAF Brize Norton in England and sprayed a number of military planes with paint.
Palestine Action is due to challenge its prohibition in the UK courts in the autumn.
Yesterday, in London, police arrested 474 people at a demonstration in support of Palestine Action, which has also carried out protests at firms it links to the Israeli military.
