Neighbours and the emergency services are searching through the night for a three-year-old boy who has been missing from his home for around 24 hours.
A major ground, air and sea search has so far failed to trace any sign of Mikaeel Kular who disappeared as his family slept in Edinburgh.
The child's mother put him to bed at around 9pm on Wednesday only to find his room empty yesterday morning.
A police helicopter, sniffer dogs, coastguard and lifeboat teams have been searching the area surrounding the flat he shares with four siblings in Ferry Gait Crescent.
Neighbours were also recruited, with police urging people to check their gardens, sheds, parks and lock-ups.
The overnight temperature in Edinburgh was expected to fall to around 3C.
Police have activated the Child Rescue Alert system, which is usually reserved for abduction and kidnap cases and supported by all police forces across the UK.
A special telephone number has been set up for anyone who has seen the child or has information about his whereabouts. Calls to the 0300 200 0200 number will be answered by dedicated members of staff.
Superintendent Liz McAinsh of Police Scotland said the force was using all the resources at its disposal in the hunt. The search focus remains in Edinburgh, particularly in the Drylaw, Pennywell, Muirhouse and Silverknowes areas.
She said last night: "Our inquiries to trace Mikaeel have been ongoing for over 12 hours now and so far, we have still to receive that vital piece of information that will lead to his discovery.
"I would like to thank the local community for their continued support and assistance during the search, and I also wish to thank those who have already called our dedicated number with information.
"All information received is being quickly progressed by our officers and I'd like to urge anyone who thinks they may know where Mikaeel is be to get in touch if they haven't done so already."
Mikaeel, who has two sisters and two brothers, was discovered missing from his bed by his mother at around 7.15am yesterday.
He usually sleeps in the same room as his twin sister but was alone on Wednesday night.
His jacket and shoes were missing and police are looking into whether he might have left of his own accord. They say there is currently no evidence of any criminal behaviour.
Ms McAinsh said police have spoken to all close members of the boy's family who are assisting police.
Mikaeel is slim, 3ft, of Asian appearance and possibly wearing a thigh-length beige hooded coat.
He may also be wearing black gloves with multi-coloured fingers, dark navy blue jogging bottoms, a grey pyjama top with an embroidered turquoise dinosaur on the chest and brown Clarks shoes.
He has a faded scar on the bridge of his nose and a sore on the left hand side of his mouth.
Police last night issued a new photograph of the missing boy, showing him in the beige jacket he was believed to be wearing when he disappeared.
Concerned residents are expected to join the emergency services in a second day of searching.
One woman, who did not want to give her name, said yesterday: "I got woken up at the back of 7am by the police, asking if I'd seen the wee one.
"I got the fright of my life because I've got a child. It's just absolutely horrific."