Angry protesters have swarmed the NYPD commissioner's home on West 73rd street in Manhattan, in response to the arrest of a protester who was bundled into an unmarked van on Tuesday.

Furious that one of their own had been arrested in such a way, the protest march, which the 'kidnapped' woman was part of, made its way to NYPD Commissioner Dermot Shea's home in the early hours of Wednesday morning, as eyewitness video from the scene purports to show.

Sirens wailed and strobe lights flickered as the mob grew restless outside the top cop's house. The clearly aggrieved group also began banging, jeering and whistling, creating as much noise as possible.

Video of the arrest went viral and generated outrage online, with commenters decrying the authoritarian tactics used against protesters. The NYPD claimed that the woman bundled into the van had been "wanted for damaging police cameras during five separate criminal incidents in and around City Hall Park."

The NYPD added that its warrant squad regularly uses unmarked vehicles to locate wanted suspects and that uniformed bicycle police were also on-scene while carrying out the arrest.

Shea also ordered the tearing down of the Occupy City Hall encampment last week, further invoking the ire of anti-police brutality protesters.

The commissioner on Monday decried the uptick in violence, particularly shootings, in his city, warning residents that the spike in shootings would likely continue for the rest of the summer.

"It's going to take some time to address the significant uptick in violence that we see," Shea said, citing the 15 shootings "just on Sunday" as an example.

The Russian embassy in Minsk has said it does not have any information about Russian citizens being detained in Belarus. It follows media reports about the arrest of suspected members of the 'Wagner' private military company.

The embassy has requested official information on detentions following the media reports, diplomats said. "The embassy has not received any official notifications about any Russian citizens detained on the territory of Belarus," the diplomatic mission wrote in a Twitter post.

Earlier, Belarusian state news agency, Belta, reported citing law enforcement sources that 33 'Russian citizens' suspected of being the members of the company were arrested in Belarus.

"If these are indeed Russian citizens... we must immediately contact the Russian officials and demand that they explain what is going on," Lukashenko said at the emergency meeting of national security chiefs broadcast by local channels.

It is too early to jump to any conclusion or level accusations, Lukashenko pointed out, saying that "if they [the Russians] are innocent then it is for the better. We have no intention of smearing an allied nation." The KGB head, Valery Vakulchik, told the president that those detained were "members of the 'Wagner' private military company" - a shady company providing mercenary services throughout the world said to be operating from Russia.

The media has immediately tied the arrests to the August 9 election in Belarus, where Lukashenko is seeking re-election for the sixth term in a tense election campaign. State news agency Belta reported that as many as 200 'Wagner' fighters could have arrived in Belarus to supposedly "destabilize" the situation in the country ahead of the vote, already marred by controversial arrests of opposition figures, with one even fleeing to Russia and claiming the KGB were after him.

Meanwhile, some Russian media have theorized the timing of arrests were in favor of Lukashenko, bringing up his recent comments about private military contractors used in "Maidan"-like revolutions - a reference to the 2014 coup in Ukraine - which he offered to a special forces brigade on Friday. Lukashenko bluntly responded to these theories during the briefing, telling these media and some "Telegram channels" to "cut the cr*p."

Moscow on Wednesday said it received an official note on the arrests from Minsk, while several officials said they were baffled at the allegations of a 'Russian plot.' Russia has never had any plans aimed at political destabilization in Belarus and "something like this cannot exist even in theory," Vladimir Dzhabarov, a deputy head of the Senate's foreign relations committee and a high-ranking officer of the FSB, has said, adding that "Belarus will remain our closest ally in any case."

"The activities of private companies have nothing to do with the government's policies," added senator Aleksey Kondratyev, addressing the alleged role of the 'Wagner' group.