A man wearing a Trump t-shirt is being sought by police after allegedly today shouting anti-Muslim abuse at people outside one of the Christchurch mosques where worshipers were killed in the March 15 terrorist attack.

Police confirmed to 1 NEWS they are "aware of a man who acted in a disorderly manner" at the Deans Ave mosque today.

They are looking to speak with him and he could face a disorderly behaviour charge.

The alleged incident was outlined on the Muslims in Christchurch & Canterbury Facebook page this evening featuring a picture of the alleged man wearing a black "Trump 2020" t-shirt.

"Today I went saw this guy at the front of the masjid wearing a shirt labelled Trump for New Zealand," Adrian Wright posted on the page.

"He was swearing and saying that all Muslims are terrorists and that we hate Jesus, in addition to saying that we all need to leave NZ, among other things.

"He was there for about 15 minutes, he also kicked and tried to damage some of the memorial items along Deans Ave in front of the masjid."

He claimed police let the man in the Trump t-shirt at the scene go.