Visiting young Syrian refugees in Jordan and Lebanon today, in camps supported with British money, David Cameron urged other EU countries to give more aid money to improve conditions.
He told ITV News that caring for refugees in these camps is the best thing for all concerned.
"It's now time for other countries to step up and join us doing even more because if we don't spend that money, many, many more people will make that potentially lethal crossing to Europe and lives will be lost," he said.
ITV News' Senior International Correspondent John Irvine reports:
On a visit to Jordan, David Cameron says that the EU must "follow Britain's lead" and fund more refugee camps around Syria.
The prime minister has insisted the UK will not participate in plans to redistribute 160,000 refugees who have arrived in Europe.
Train traffic with Austria suspended as German authorities seek to reduce the number of asylum seekers arriving in the country.