A member of the Alliance Party's youth wing has returned back to the UK after being deported from Israel.
Gary Spedding, 23, was detained by immigration officials on Thursday after he arrived at Tel Aviv's Ben Gurion airport.
He had travelled to Israel to meet Israeli politicians and non-governmental organisations (NGOs).
After being detained overnight, he was put on a flight bound for the UK on Friday evening.
Alliance MP Naomi Long said Mr Spedding had been travelling in a personal capacity.
"He was detained on the basis that his campaigning for Palestinian rights was viewed by the authorities in Israel to be a threat to stability in that he could have arranged campaigns or protests while he was in the country and I think that was largely based on work that he had done, particularly campaigns led on social media," she said.
"However, I was concerned to learn he had been detained and I was understandably worried for his welfare.
"I contacted the Foreign and Commonwealth Office on his behalf as soon as I learned of his circumstances and ensured he received consular assistance. I am glad he is safe and well, and is now on his way home."
After arriving back in the UK, Mr Spedding told BBC News the authorities deported him and issued him with a 10-year ban from entering the country because of his campaigning on the social media site Twitter.