He died at the scene just before 11.30pm.
'He was taken to a central London hospital where he was pronounced dead later that evening.
A woman in her 20s, who knew the victim, has reportedly been arrested on suspicion of murder.
Those deaths brought the number of murders in London so far this year, where the Metropolitan Police have publicly released details, to around 59.
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He admitted that Sunday's game against Spurs would be another hard game for his side. "We have to do it tomorrow". Tottenham fans will surely be delighted to hear the news that the Argentine will not be fit for tomorrow's game.
Police and paramedics were called to Chestnut Avenue where they found the 18-year-old suffering from knife wounds at around 10.50pm.
Scotland Yard was questioning a woman in her 20s concerning the killing.
In a report submitted to Southern Police District Chief Tomas Apolinario said Nacion was said to have spoken with her wife through phone who was working overseas moments before the incident.
Police received a report about a disturbance in the crime scene located along Pangilinan street where the two kids were reportedly heard crying.
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Incidents included mid-air engine failures, smoke and fumes in the cabin, and rapid descents among other issues. Last year, Allegiant Air flight attendants picketed outside McCarran International Airport while on strike.
Two people were stabbed in separate incidents on the same block in the Mission over the weekend, police have reported.
Police said his family were still being informed and that formal identification and a post-mortem would be arranged. He is in custody at a south London police station.
The most recent incident has not yet been classed as a suspected murder.
Manchester City wins English Premier League title after rivals Manchester United stumble
Here's the best of the social media reaction to City winning the Premier League for the third time in the club's history. You could see the difference in the attitude to players compared to last week.