Police are urgently hunting Rehan Khan aged 25.
If you see him do not approach him call 999 immediately.
They urgently want him on suspicion of stabbing an 11 month old and 32 year old woman in West London.
The 11 month old boy is in a critical condition and is fighting for his life.
Officers want to speak to Rehan Khan, 25, who is known to frequent the Hounslow and Isleworth areas and has links to Newham, Slough, Hammersmith and Fulham.
He is wanted on suspicion of attempted murder and officers have warned members of the public not to approach him.
Police were called to Swinfield Close in Feltham at 7.12pm on Monday.
The Metropolitan Police said the boy remains in a critical condition, while the woman’s injuries are not life threatening.
An air ambulance took the pair to a nearby hospital for treatment, while officers and police dog handlers scoured 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.
On an immediate sighting of Rehan Khan call 999.