Three of that group then went to the Gull petrol station in the white Mazda and, shortly after leaving there, assaulted a 45-year-old male and stole his motorbike, police say.
Police are asking for these people to come forward while detectives continued to piece together exactly what happened.
The police inquiry team also wanted to speak with anyone who saw any of these events, or has knowledge of what happened.
The team, consisting of detectives from the wider Bay of Plenty - including Tauranga, Rotorua and Tokoroa - is committed to establishing the facts surrounding all three incidents and holding those responsible to account, the statement said.
Anyone with information should contact Police via 105 and quote file number 220214/0810, or call Crime Stoppers anonymously on 0800 555 111.