Businessman and Republican presidential candidate Donald Trump said the U.S. will have to “strongly consider” shutting down some of the country’s mosques during a Monday morning interview on MSNBC’s “Morning Joe.”

After the attacks that rocked central Paris and killed more than 100 people, the French interior minister called for the closing of radical mosques in France.

On MSNBC, host Joe Scarborough asked, if President, would Trump consider closing mosques?

“I would hate to do it but it would be something that you’re going to have strongly consider,” Trump said. “Some of the ideas, some of the hatred, absolute hatred, is coming from these areas.”

Trump then seemed to walk back the comment almost immediately: “It’s something that many people, not me, but many people are considering and many people are going to do.”

Trump also told MSNBC the government should consider bringing back “tremendous surveillance going in and around the mosques of New York City” during “the old days.”

“We’re going to have to watch and study the mosques because a lot of talk is going on at the mosques,” Trump said. “And from what I heard, in the old days, meaning a while ago, we had great surveillance going on in and around mosques in New York City. I understand our mayor totally cut that out. He totally cut that out. And I don’t know if you’ve brought that up, and I’m not sure it’s a fact, but I heard that under the old regime we had tremendous surveillance going on in and around the mosques of New York City. And right now that’s been totally cut out.”

Watch the clip, from MSNBC, below: