Photo: Julian Cadman's father has arrived in Spain to join the search for his son. (Supplied)

Fears for Australian boy caught up in Las Ramblas as father arrives in Spain

By Europe correspondent James Glenday in Barcelona

20 Aug 2017,

(Translation of this article appears in Arabic section)

The father of an Australian boy caught up in the recent Spanish terrorist attacks has touched down in Barcelona.

Grave fears are held for Andrew Cadman's son Julian, who was separated from his mother during the van attack.

There has been no formal word on the condition or whereabouts of the seven-year-old Sydney boy, since the assault on Las Ramblas boulevard on Thursday (local time).

Spanish officials confirmed overnight that all those injured or killed in the attack have been located.

What we know about the attack

Mr Cadman was met by consular staff at Barcelona Airport and taken immediately to an official justice building, the place where victims of the attacks are being identified.

He then travelled to the hospital where his wife, Jumarie, is being treated for serious injuries.

Jom, as Ms Cadman is known, is doing "really well", according to information the family has received from the hospital.

Prime Minister Malcolm Turnbull said his thoughts were with the family.

"I think we should all in our quiet moments say a prayer for that little boy," he said.