Sinn Fein MEP Martina Anderson has failed in her third attempt to enter Gaza, she said.
After being held in Tel Aviv airport for questioning for over two hours on Tuesday, Ms Anderson said she was informed by Israeli authorities that the European delegation which she has led to Jerusalem, with the hope of visiting Gaza, will once again be denied access.
Ms Anderson said that she also led a delegation of left-wing MEPs to Palestine in September that was also blocked.
Speaking from East Jerusalem, she said: “I vehemently condemn the Israeli authorities’ decision to deny this delegation access to Gaza for the second time. For me personally, this my third attempt.
“It is unacceptable that an official EU delegation to Palestine are refused entry to inspect the humanitarian situation and the destruction in Gaza given that the EU is largest donor of finance to Palestinians.”
Despite stating clearly that the remit of this delegation was to identify areas in dire need of vital public services such as schools, health centres and food distribution centres, they continue to be blocked, she added.