Three men have been arrested after a jet ski was ridden dangerously close to swimmers at Half Moon Bay on Saturday.
Police from the Public Order Response Team (PORT) and Moorabbin Police were patrolling at about 3pm when they saw a jet ski being ridden close to swimmers.
Police will allege the rider was speeding in a no boating zone, narrowly missing multiple people in the water.
Three men were later arrested at a nearby boat ramp where it's alleged one of the men assaulted a police officer.
A 21-year-old man from Craigieburn will be charged on summons with conduct endangering life.
A 24-year-old man from Hadfield will be charged on summons with assaulting police.
A 22-year-old man from Fawkner will be charged on summons with hindering police.
The Marine Investigation Unit is investigating allegations of linked offending from earlier in the day.
Anyone with information, video footage, or who saw the alleged offending is urged to phone Crime Stoppers on 1800 333 000 or submit a confidential report online at www.crimestoppersvic.com.au.
Jet ski hoon behaviour will be targeted as part of a wider operation with the projection of increased boating activity this summer.