Families of those killed in the Oct 7, 2023 Hamas attack marked the third anniversary on Wednesday by demanding an investigation into whether senior Israeli officials received intelligence warnings in advance, as controversy over what leaders knew mounts less than a month before elections.

At a national memorial ceremony organized by the Kumu movement, founded by families affected by the attack, Omri Shifroni, a movement founder and relative of victims, said, "That morning, the systems collapsed, and the state failed to function."

"To rebuild trust, we also need the truth. We must know what happened," Shifroni said, drawing sustained applause.

The calls for accountability have intensified amid scrutiny of Israeli Prime Minister Benjamin Netanyahu's actions before the attack.

Israeli public broadcaster Kan recently reported that Netanyahu had asked President of the United Arab Emirates Sheikh Mohamed bin Zayed Al Nahyan to publicly deny having warned him of an impending attack before Oct 7, 2023. Netanyahu has denied receiving such a warning.

11 pro-Palestinian people arrested in London

Eleven people were arrested as multiple pro-Palestinian demonstrations were held in London on Wednesday, the Metropolitan Police was quoted by the BBC on Wednesday as saying.

Five of them were arrested on suspicion of inciting racial hatred at a protest in north London, and the other arrests were made at student-led pro-Palestinian protests and a counter-protest, according to the report.

Pro-Palestinian protesters chanted "free Palestine from the river to the sea" during their march from Lincoln's Inn Fields to Russell Square on Wednesday afternoon.

Wednesday marked three years since the Gaza conflict erupted on Oct 7, 2023. The coastal enclave has been left in ruins, with tens of thousands of people killed. While a ceasefire has been reached, the underlying issues at the heart of the conflict remain unresolved.