Anyone who can identify these two people should contact Auckland City Police on 105 or anonymously via Crimestoppers on 0800 555 111.

Police are urging the public for help identifying two people involved in an incident where Auckland Transport staff were allegedly spat on.

The incident unfolded on a train on Friday morning, with a woman spitting at three transport officers, deemed essential workers during the coronavirus lockdown.

The woman and her male companion were asked to disembark the train at the Britomart Train Station as they were not undertaking essential travel, police said in a statement.

In response, the woman spat towards three Auckland Transport workers, an act which AT chief executive Shane Ellison labelled "quite upsetting".

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The officers, two men and a woman, were stood down from work and are in isolation.

The incident was caught on CCTV and police have released an image of those believed to be responsible.

SIMON MAUDE/STUFF Auckland Transport chief executive Shane Ellison said the incident at the Britomart Train Station was "quite upsetting" (file photo).

Anyone with information regarding their identities should contact Auckland City Police on 105 or anonymously via Crimestoppers on 0800 555 111 quoting case number 200417/7577.

"Police are appalled at this type of behaviour, especially in the current environment, which places essential workers at risk. This type of behaviour will not be tolerated by police," the statement read.

"We also want to remind the public that Alert Level 4 restrictions are still in place and travel should only be made for essential purposes."

Police are continuing patrols to ensure the public abides these restrictions.

A similar incident unfolded in Māngere on Wednesday night, when a member of the public spat at an Auckland Transport security guard.

A police spokesman confirmed a 25-year-old man was arrested shortly after the incident and charged with common assault and willful damage.

He will appear in the Manukau District Court on May 29.

Ellison previously said staff and contractors worked in all weathers to make sure essential workers can get to their jobs.

"We cannot tolerate this sort of behaviour."

Auckland Transport was working with police to make sure staff can work without being assaulted.

"It's quite disturbing that a few people are acting like idiots, we've been getting some great feedback about the efforts that we have been making to get people around the city in these tough times but to have incidents like this is quite upsetting."

On April 9, New Plymouth man Daniel Ngaiwi Rawiri, 33, was jailed for three months after pleading guilty to aggravated assault after he spat on police officers.

If someone spits or coughs on another person and infects them, they risk being charged with infecting with disease under the Crimes Act and face a penalty of 14 years in prison should they be found guilty.