U.S. President-elect Donald Trump condemned the attack at a Christmas market in Berlin as "an attack against humanity" on Wednesday.

Trump on Monday blamed the Berlin attack, which killed 12 people, on Islamist terrorists who "continually slaughter Christians in their communities and places of worship as part of their global jihad."

Asked about that statement by reporters outside his Mar-A-Lago resort in Palm Beach, Florida, on Wednesday, he said, "It's an attack on humanity, and it's gotta be stopped.

"What's happening is disgraceful," Trump said, adding that he has not talked to President Barack Obama since the Berlin attack or the assassination of a Russian ambassador in Turkey, both on Monday.