A man has been arrested after allegedly committing an indecent act in front of a medical centre in Palmerston North.
Police responded to the incident on Victoria Avenue around 3.50pm on Friday, where the man was arrested and taken into custody.
"Reports have led us to believe this was not the only incident, and there may be further victims to his alleged offending," a police spokesperson said.
Police described another incident in which a man driving a green van was reported to be chasing another vehicle down Featherston Street at about 2.15pm.
The driver was said to be waving a firearm out the window while following a red vehicle, police said.
"This behaviour is very concerning and presents a risk to members of the public.
"If you witnessed a similar offence recently and have not yet reported it to Police or witnessed the green van driving down Featherston Street yesterday, we would like to hear from you."
Police were asking anyone with information to contact investigators by calling 105 or anonymously via Crime Stoppers on 0800 555 111.