US President-elect Donald Trump has said he will deport two to three million undocumented immigrants “immediately” upon taking office.

He also insisted that a wall will be built between the United States and Mexico.

In his first television interview since his victory in November 8 election, Trump vowed to see through his tough proposals for immigration policy. The interview with CBS’ “60 Minutes” was due to be aired later on Sunday.

On entering office in January, Trump said he will deport as many as three million undocumented migrants.

“What we are going to do is get the people that are criminal and have criminal records, gang members, drug dealers, where a lot of these people – probably two million, it could be even three million – we are getting them out of the country or we are going to incarcerate,” Trump said.

“But we’re getting them out of the country, they’re here illegally.”

Trump’s comments contradicted those made by House Speaker Paul Ryan, however, who told CNN’s “State of the Union” on Sunday that mass deportation is not a focus of Republicans right now.

“I think we should put people’s minds at ease” on mass deportation because the top priority is really border security, Ryan said.

Reiterating his plans to build a wall between the US and Mexico, Trump also said in Sunday’s interview it may not entirely be built from concrete or bricks and mortar.

“There could be some fencing,” Trump said. “But [in] certain areas, a wall is more appropriate. I’m very good at this, it’s called construction,” he added.

The wall, which was a focal point of Trump’s election campaign would, according to the president-elect in previous statements, be paid for by Mexico.

Once the border is “secure,” the Bureau of Immigration and Customs Enforcement will assess the status of the remaining undocumented immigrants in the country, Trump told CBS.

“After the border is secure and after everything gets normalized, we’re going to make a determination on the people that they’re talking about who are terrific people, they’re terrific people but we are gonna make a determination at that,” he said.

“But before we make that determination … it’s very important, we are going to secure our border.”

When specifically asked if he actually intends to build the wall along the southern border, Trump simply replied, “Yes.”

However, Trump explained that the wall along the 1,900 mile border would likely not be as grandiose as he promised – describing an iteration of the boundary between the two countries that essentially already exists.