"Half of the total population of Syrian people, nearly 9.3 million individuals urgently need humanitarian aid," Ban said, pointing out that more than three million people have fled.
"When we met a year ago, four million Syrians needed aid ... A year later, we face a regional crisis and a humanitarian crisis," Ban said.
The one-day second International Conference for Humanitarian Pledging for Syria aims to collect $6.5 billion to aid Syrians.
AFP