A man - who was believed to be planning a terror attack - was arrested in the Turkish province of Tekirdag, three hours from the Gallipoli peninsula, ahead of a dawn service there on Thursday.

"This is more of a routine thing that we've seen happen with Turkish authorities and we could not say at all that there is any link between that arrest and any planned event at Gallipoli," Mr Morrison told reporters in Townsville.

"I would caution overstating any link between those two events."

Mr Morrison said the government had received reports suggesting any link between the arrest and the service was inconclusive.

The prime minister said normal security arrangements were in place and the services would go ahead as normal.

The man has been named in Turkish media as Syrian national Abdulkarim Hilef, aged 25.

Opposition Leader Bill Shorten, who is seeking security briefings on the arrest, said the situation should not deter Australians from attending Anzac Day services overseas.

"Anzac Day is a sacred day. We can't afford to let these extremists discourage us."

He said the "marvellous" tradition of Australians, particularly young people, travelling to former World War I battlefields abroad should be maintained.

Veterans' Affairs Minister Darren Chester said Australia was maintaining its travel advice urging people to exercise a high level of caution in Turkey.

Turkish nationals were banned from attending the dawn service at Gallipoli, which will be attended by Australia's Chief of the Defence Force Angus Campbell, due to heightened security fears.

"It's not unprecedented that Turkish nationals, local citizens are discouraged from attending the service - that's occurred previously," Mr Chester said.

Earlier, Australian War Memorial director Brendan Nelson praised Turkish authorities for going to extraordinary lengths to secure Anzac services at Gallipoli as he responded to reports of the arrest.

"It's a reflection of the fact that we do have some people who have heinous motives," he told reporters in Canberra.

"Unfortunately we live in a world where there are people - wherever they live, whatever their background, whatever their beliefs - who are fundamentalists intent on disrupting what we do.

"The most important thing we can do is go about living our lives."

AAP

Earlier: A suspected Islamic State terrorist has been arrested in Turkey amid fears he was planning to attack Anzac Day services in Gallipoli being attended by thousands of Australians and New Zealanders.

The 25-year-old Syrian man, named as Abdulkarim Hilef, was detained in Tekirdag, a northwest province near the Gallipoli peninsula, a Tekirdag police spokesman said on Wednesday.

Every year, Australians and New Zealanders travel to Turkey for WWI memorial services commemorating the failed 1915 military campaign by ANZAC and allied forces to drive Ottoman troops from Gallipoli and the Dardanelles region.

The local Demiroren news agency said the man believed to have been preparing an attack by bombing or driving into crowds in retaliation for the Christchurch mosque shootings in New Zealand in March, which resulted in the deaths of 50 people.

Other local media reported the man was picked up after other ISIS members were arrested in the city of Osmaniye.

"His phone number was found on their phones and he was tracked," the Aydninlik news outlet said according to an online translation.

Turkey's Daily Sabah said the attack could have taken place ceremonies being held on April 25 in western Canakkale.

It comes after Sri Lanka this week said it believed the ISIS-linked suicide bombings at multiple Christian churches on Easter Sunday that killed 359 people were in retaliation for the NZ killings.

Turkish nationals have been banned from attending the Anzac dawn service Gallipoli on Thursday, which will be attended by Australia's Chief of the Defence Force Angus Campbell, amid heightened security fears.

Australia's Department of Veterans' Affairs said it was aware of reports of the arrest made by the Turkish National Police, adding it was a matter for Turkish authorities.

Turkey has previously blamed ISIS for several bombings in the country in 2015 and 2016, which killed 200 people in total.

Although the militant group has not been active in Turkey of late, authorities still carry out routine operations against suspected ISIS members.

This year's Anzac service comes a month after Turkish President Tayyip Erdogan faced criticism in Australia and NZ for comments he made after a lone gunman fired on congregations in two mosques in Christchurch attending Friday prayers on March 15.

Erdogan played a video from the shootings at local election rallies and said the gunman had targeted Turkey by saying in a manifesto posted online that Turks should be removed from the European half of Istanbul.

He also threatened to send back "in coffins" anyone who tried to take the battle to Istanbul.

Australian Brenton Tarrant, 28, a suspected white supremacist, has been charged with 50 counts of murder in relation to NZ's worst peacetime mass shooting.

This year marks the 104th anniversary of the landing of the Anzacs in Gallipoli, where tens of thousands of soldiers died.

- Matt Coughlan with Reuters