 WFP said it's been operating at the pier as the logistics arm of the United Nations on behalf of the Gaza humanitarian community. Last week, pieces of the pier washed up on a Tel Aviv beach and it had to be re-anchored to the Gaza shoreline after heavy seas and high winds disconnected it from the beach twice. The UN is also investigating whether the pier was used in an Israeli military raid in May to rescue hostages. The operation killed more than 270 Palestinians.