"Witnesses saw two males pushing the bikes along Wharf Road towards the bridge around this time," South Coast Police said.

Both males were described as teenagers, skinny build, with one wearing a red hooded jumper.

"The pushbikes hold significant sentimental value to the family as one of the bikes belonged to a young girl who recently passed away," police said.

Anyone with information is asked to contact Batemans Bay Police on 4472 0099 and quote E75928069, or report information to Crime Stoppers on 1800 333 000.