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Protesters gathered at a Philadelphia Starbucks on Sunday and planned to regroup again on Monday morning after two black men were arrested there last week when they allegedly refused to leave.

Demonstrators carried megaphones and signs that said phrases like, “Too Little Too Latte,” and confronted the employees behind the register, according to NBC Philadelphia.

The original incident occurred on Thursday, when a Starbucks employee called 911 because two black men were sitting inside the café. Soon after they arrived, police handcuffed the men and escorted them out of the shop.

Philadelphia Police Commissioner Richard Ross, who is black, said the men hadn't purchased anything and refused to leave, which led to the arrest.

@Starbucks The police were called because these men hadn’t ordered anything. They were waiting for a friend to show up, who did as they were taken out in handcuffs for doing nothing. All the other white ppl are wondering why it’s never happened to us when we do the same thing. pic.twitter.com/0U4Pzs55Ci — Melissa DePino (@missydepino) April 12, 2018

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A video of the arrest and ensuing confusion went viral on Twitter.

Michelle Saahene witnessed the entire event, as she’d been at the Starbucks for nearly an hour. She told NBC News on Sunday that, as a black woman, she was slightly nervous when the police officers entered the coffee shop, but she was then as shocked as the two men when they were approached by the members of law enforcement.

After the two men were refused the bathroom, they just sat at a table silently and played with their phones as they waited for a friend, Saahene told NBC News.

"The cops were asking them to leave because they weren’t purchasing anything," Saahene said. "[The two men] said they were confused. This is a Starbucks. Since when are people asked to leave a Starbucks who are just sitting there?"

Protester Soren Mcclay, 14, holds a sign outside a Center City Starbucks on April 15, 2018 in Philadelphia. Mark Makela / Getty Images

Saahene said that a white man sitting next to her had been at the Starbucks for 30 minutes without making a purchase and a jogger came in and used the bathroom without making a purchase.

That’s one of the reasons she felt compelled to approach the employee who called 911.

“’Did you feel threatened’?” she said she asked the Starbucks barista. “She didn’t look at me. ‘Did you feel like your life was threatened?’ She still didn’t look at me.”

“I got to the other side of the Starbucks and yelled, ‘you’re a coward!’” Saahene added.

Starbucks CEO Kevin Johnson swiftly apologized that the 911 call was made and that the two men were arrested. He said that the company planned to investigate the matter and retrain its staff, but said the store manager “never intended for these men to be arrested and this should never have escalated as it did.”

"Creating an environment that is both safe and welcoming for everyone is paramount for every store," Johnson said. "Regretfully, our practices and training led to a bad outcome — the basis for the call to the Philadelphia police department was wrong. Our store manager never intended for these men to be arrested and this should never have escalated as it did."

And here I thought Philadelphia was the city of "Brotherly" love. Ain't you supposed to love brothas @Starbucks — Prentice Penny (@The_A_Prentice) April 15, 2018

Message to the @Starbucks in Philadelphia....Our city is shining bright like a diamond right now. Please make this situation right. I repeat please make this situation right!!!!!!! Once again MAKE THIS RIGHT — Kevin Hart (@KevinHart4real) April 15, 2018

The arrest of 2 African-American men in a Philadelphia @Starbucks is deeply troubling. This event is not representative of how Starbucks operates. Kevin Johnson’s apology & actions are a good 1st step. An investigation will follow, and we should give them the time to do it. — Billie Jean King (@BillieJeanKing) April 15, 2018

But many remained unhappy with the chain. Rather than taking to the streets, however, they shared their displeasure on social media.

Saahene, meanwhile, said she was overwhelmed by the support she received from the multiple white women who stood with her and then walked out of the Starbucks with her. They helped bring attention to the injustice of the situation, she said.

"That’s so important because for us to be successful we need those in the majority to take a stand," Saahene said. "We as minorities have been crying for help have been pushing for social justice, but it’s not going to get better until we have the majority standing up for us."