BRUSSELS - The European Union will send another 400 million euros ($523 million) of aid to Syria and its neighbours, European Commission President Jose Manuel Barroso said on Thursday, calling Syria "a stain on the world's conscience".Barroso said the EU was already the biggest humanitarian donor in response to the crisis, committing more than 840 million euros to alleviate what he called "the most dramatic humanitarian situation in the last decade"."But the worsening of the situation requires extraordinary measures. This is why (we) will deploy a comprehensive package of humanitarian and non-humanitarian assistance, mobilizing an additional 400 million euros for Syria and neighboring countries, in particular Lebanon and Jordan," he said."We need unrestricted and unconditional humanitarian access and we need a transitional inclusive government. The situation in Syria is a stain on the world's conscience. We all have a duty to act," Barroso added.