Police are investigating a possible double shooting which they believe took place at a house party in the early hours of this morning (Monday).
Officers were called at approximately 4am to Bleinheim Gardens in North Wembley where they found a woman in her 30s suffering from gun shot wounds.
At 4.10am, staff at a west London hospital also contacted police after a man in his 20s was admitted with gun shot injuries which are said to be life-threatening.
Police are linking both shootings.
Trident, the Met's black gun crime unit, is investigating and a police spokeswoman said no arrests have been made.