A six-year-old American boy has written a heartfelt letter to Barack Obama to offer a Syrian refugee a home with his family.

Alex, from New York, wrote the letter after seeing the photograph of a bloodied and dazed Omran Daqneesh, after he was hurt by an air strike.

"Dear President Obama, remember the boy who was picked up by the ambulance in Syria?" Alex wrote in a letter published by the White House.

"Can you please go get him and bring him to our home ... we'll be waiting for you guys with flags flowers and balloons. We will give him a family and he will be our brother."

A video of the boy and his letter was shared by The White House:

Obama quoted Alex's words at a United Nations summit on the refugee crisis this week, before the White House recorded Alex reading them himself.

Obama said the letter was from a child "who hasn't learned to be cynical, or suspicious, or fearful".

The President said: "We should all be more like Alex."

"Imagine what the world would look like if we were. Imagine the suffering we could ease and the lives we could save."

The photo of the injured Omran Daqneesh prompted outrage around the world when it surfaced online on Aug. 17, 2016.

This is Alex's full letter released by The White House:

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