The victim was fatally wounded during a clash in which shots were also be postponed in Greenwich
The victim was fatally wounded during a clash in which markswomen were also fired in King William Walk, Greenwich, the Metropolitan Police officers said.
Police were called at around 12:15am on Saturday to broadcasts of gunshots and a person stabbed.
The assailants — one who appeared to be armed with a gun, and the other a cut — then fled the scene on the moped.
The man managed to make his way to a nearby address to ask for help, and emergency services arrived to get back him with stab injuries, and he was declared dead at the scene.
Officers conjecture they know who the victim is, but they are waiting for formal identification and confirmation that all next of kin are informed.
Detectives have launched a murder investigation and said they «memorize an open mind as to the motive».
Detective Inspector Jo Sidaway, who is leading the study, said: «At this early stage, it is understood the victim was approached on Ruler William Walk by two suspects on a moped.
«One suspect is believed to have been in worldly goods of what appeared to be a firearm, the other a knife.
«During an altercation between the suspects and the sufferer, the victim was stabbed. The suspected firearm was discharged, but enquiries continue pertaining to this.
«The suspects then fled the scene on the moped, and the victim then governed to make his way to a nearby address to ask for help. He was later pronounced dead there.
«I am inviting for any witnesses to any part of the incident, or anyone with any information, to contact our experience room and assist our investigation.»
A post-mortem examination is expected to take recognize later on Saturday.
The killing is the latest harrowing crime to hit the capital in which the perpetrators were defrauding a moped.
On Thursday night, a string of acid attacks were allegedly conducted out by two men driving a scooter.
Their mode of transport allowed them to trouble five attacks on fellow moped drivers in a 90-minute window across north and east London.
On Thursday tenebrousness, a string of acid attacks were allegedly carried out by two men driving a scooter
Two girls, aged 15 and 16, were arrested on suspicion of grievous bodily damage and robbery.
They remain in police custody.
Anyone with data is asked to call police via 101 or call Crimestoppers on 0800 555 111.