On Sunday, what appeared to be blood was smeared across the front door of a house in Archford Croft.
Two forensic officers could be seen inspecting an object on the driveway next to a black BMW.
One neighbour said she heard a “commotion” involving screaming, shortly before midnight, but did not see what happened.
“The police were here pretty quick,” she said.
Another neighbour, who lives in an adjacent cul-de-sac, said that she knew the boys but declined to give their names.
She said: “This gang of kids have been hanging around Archford Croft – it’s all gang-related.
“We do know that there was a house party at the time, not here but another part of Emerson. I think it’s just because there was a house party and then the trouble started from there.”
One woman, whose home overlooks the property’s garden, said she did not see or hear anything and described the neighbourhood as “peaceful”.
“It’s just a nice peaceful part of Milton Keynes. There’s never been any
incidents, not since I’ve been here, which is quite a while now,” she said.
The MP for Milton Keynes South said he was shocked and that he would be speaking to police.