For the third time this week, an NYPD officer fatally shot and killed a teen.

18-year-old Ramarley Graham was shot inside the bathroom of his Bronx home following a foot pursuit by a team of officers in plain clothing. Graham was unarmed and was not physically dangerous.

Authorities say police spotted Graham (who's had eight prior arrests and charges, including robbery, drug possession and resisting arrest) when he took off running. According to Eyewitness News, police saw Graham moments before the shooting adjusting his waistband, and thought he had a weapon.

Source - 7 ABC