At least 65 people were arrested in protests following Donald Trump's surprise victory in the US presidential election, even as Trump-themed swastika graffiti was found in a local town in New York, media reports said.
On Wednesday in Wellsville, New York a passer-by spotted a swastika and the phrase "Make America White Again" on a softball dugout, according to a local daily.
Graffiti, with Nazi imagery and the word "Trump", was also discovered on a storefront in Philadelphia.
Police said they would look into the incident, though they haven't received any reports.
Meanwhile, thousands of people gathered on Wednesday afternoon in Union Square, Columbus Circle and other parts of New York City for demonstrations that had been organised via social media.
The New York City Police Department confirmed on Thursday that at least 65 people were detained on different charges, including disturbing the peace and resisting arrest, ABC News reported.
As in other cities, the protesters in Manhattan chanted "Not Our President" and "New York Hates Trump" and held up signs with messages that included "Don't Lose Hope".
Even after police intervention, hundreds of protesters continued toward Trump Tower, where police formed a barricade to prevent people from getting too close to the 58-story building.
In another development, disturbing footage from Chicago has emerged showing a mob beating a man for supposedly voting Trump.
The footage shows the victim being clobbered by at least two others, as onlookers heartily cheer in the background.
A spokeswoman for the Chicago police said Thursday the department learned of the footage on Wednesday.
"We're looking into it. We have no new information to add to it," New York Post quoted a Chicago police officer as saying.
Meanwhile, US President-elect Donald Trump said it was a "great honour" to meet President Barack Obama, as the two met for transition talks at the White House.
"So Mr. President, it was a great honour being with you, and I look forward to being with you many, many more times in the future," Washington Post quoted Trump as saying on Thursday.
"We discussed a lot of different situations, some wonderful and some difficulties. I very much look forward to dealing with the president in the future, including counsel," he added.
After the roughly 90-minute meeting, Obama said: "I want to emphasize to you, Mr. President-elect, that we now are going to want to do everything we can to help you succeed because if you succeed, then the country succeeds."
A day after his shock victory in the US presidential elections, Trump's first visit to Washington as the President-elect began around 10.30 a.m. as he landed at the Reagan National Airport on a private jet.
The president-elect was accompanied by his wife, Melania, who had a meeting with First Lady Michelle Obama.
Trump later met with House Speaker Paul Ryan at the Capitol and said they also would work together "to lower taxes" and "to fix health care and make it affordable and better".
Senate Majority Leader Mitch McConnell joined Trump and his entourage on a walking tour through part of the Capitol building.
Vice President-elect Mike Pence who is accompanying him, will meet Vice President Joe Biden.
Trump and Obama had frequently attacked each other for years, but in the aftermath of the election results where Trump beat Democrat nominee Hillary Clinton, Obama acknowledged Trump's victory, and stressed on ensuring a peaceful transition of power.