A heavily pregnant woman and her six-year-old daughter have been held at knifepoint by robbers.
The 36-year-old woman was at home in Oldham with her four children at about 7.15pm on Friday when they heard a knock at the door.
The woman's eight-year-old son opened the door and two men stormed into the house, dragging the six-year-old girl upstairs where they held a knife to her throat.
One of the men pointed the blade at the woman's stomach while the second searched the home.
The robbers, who stole a new space grey-coloured iPhone 5s, then ran out of the house and across the road down an alleyway.
The first man is described as white, more than 6ft, of heavy build, and was wearing a black wool balaclava, dark baseball cap, with the hood of his jacket up.
He wore a sleeveless black quilted jacket and a dark top, full length black wool gloves, dark blue jeans, and spoke with a local accent.
The second man is described as white, 5ft 5in, about 25 years old, with light-coloured eyes, an oval-shaped face, short patchy ginger beard, of medium build, and he spoke with a local accent.
He was wearing a black wool hat pulled down to just above his eyebrows, with the hood from his red jumper over the hat, a black sleeveless quilted coat, black gloves and brown chinos.
Detectives have released CCTV footage of two men approaching the house, on Kew Road, in a bid to identify them.
Detective Inspector Kenny Blain, from Oldham CID, said: "This was an atrocious attack on an innocent family in their own home.
"The mum is due to give birth any day and the stress this would have caused her could have potentially threatened the life of her unborn child.
"How anyone could hold a knife to the throat of a six-year-old is beyond comprehension.
"These men need to be found and we will do everything in our power to catch them.
"They are more than likely trying to get rid of the iPhone and it is likely they have tried to sell it to someone.
"If you have been approached by anyone selling a similar phone to the one stolen or have any information about this robbery, then please call police.
"Anyone who recognises the men in the CCTV or thinks they may have seen them that evening, I would urge you also get in touch."
Anyone with information should call police on 101, quoting incident number 1871 18/11/16, or call Crimestoppers anonymously on 0800 555 111.