Henderson police CIB are investigating the incident and yesterday officers were seen interviewing people who lived on Triangle Rd.
A man who lives near the roundabout said he was woken by a knock on his door by a police officer about 1am but by the time he got up, the officer had walked away.
From his window, he could see a number of police cars with their lights flashing and a cordon at the roundabout.
Another woman who lived near the scene also woke to police cars but didn't know what happened.
"That's scary. Nothing like that has happened near here before."