There are reports two British teens may have travelled to Syria, with fears they were planning to join the self-proclaimed Islamic State group.
The boys, both aged 17 are thought to have flown from Manchester to Dalaman in Turkey on 31 March.
Police in the boys’ home county of West Yorkshire are supporting the pair’s parents, who are said to be in a state of profound shock.
Assistant Chief Constable Mark Milsom told the BBC police are "extremely concerned".
"Our priority is for their safe return. Their families are gravely worried about them and want them home," he said.
News that makes sense
Your trusted source for staying up-to-date with the world around you. Get free daily news updates and analysis, straight to your inbox.
"Syria is an extremely dangerous place and the public will be aware of the dangers these boys may face.
"The choice of returning home from Syria is often taken away from those that come under the control of Islamic State, leaving their families in the UK devastated and with very few options to secure their safe return."

