A manhunt is under way after a woman and baby were stabbed in west London.
The woman, in her 30s, and a one-year-old boy were found suffering stab injuries at a residential address in the London Borough of Hounslow on Monday evening.
The Metropolitan Police said the boy remains in a critical condition, while the woman's injures are not life threatening.
Police and paramedics were called to Swinfield Close in Hanworth at around 7.12pm following a report concerning residents' safety.
At the scene they found the woman and infant suffering knife wounds and the pair were rushed hospital in west London by the Air Ambulance Service.
A witness told Sky News: "I heard a lot of screaming and crying, it was quite distressing to hear."
Local Tim Stollery tweeted: "As much as I like spotting the helicopters overhead, it can't be a good thing seeing both @NPASRedhill G-POLF & @LDNairamb G-HMS in attendance over #Hanworth #Feltham #Oriel this evening.
"Fingers crossed whoever might be on board makes a good recovery."
The Met said officers are now looking for a man who is known to live at the address and the three are believed to have been known to each other.
According to reports officers flooded the area and pictures showed police dog handlers at the scene.
No arrests have been made.
Police remained at the address on Monday night as investigators sealed off the crime scene.
Anyone with information is asked to contact Hounslow Police on 101 or tweet @MetCC quoting CAD 6981/4June or call Crimestoppers on 0800 555 111.