ENNISKILLEN, Northern Ireland (REUTERS) - United States (US) President Barack Obama will announce more than US$300 million (S$375 million) in new humanitarian aid to address the Syrian crisis, with a little less than half going to Syria itself and the rest to neighbouring countries struggling with an influx of refugees, the White House said on Monday.

Mr Obama was set to announce the aid during a dinner with other leaders of the G8 nations, the White House said, noting that the money will be spent on food, medical equipment, water and shelter.

The US has been the biggest donor of humanitarian aid during the two-year civil war in Syria, donating more than US$800 million in total.