Pulling up to Allston Car Wash on Thursday morning, the first thing customers saw was a small handful of protesters, a stark reminder that on Tuesday, ICE agents descended on the business and detained nine employees.

On the front entrance to the adjoining gas station mini mart, customers were greeted by a paper sign taped to the window apologizing for the fact that business is running on limited hours because of the raid.

Still, it was largely business as usual — cars rolled through the car wash and customers wandered through the well-stocked mini-mart on Thursday morning.

The car wash’s two managers declined to speak to MassLive on the advice of their lawyers. Todd Pomerleau, a lawyer representing the nine employees detained, said he was in the process of trying to find his clients to speak to them.

At least some of the nine employees had employment authorization cards issued by U.S. Customs and Immigration Services, which allow non-citizens to work in the country for a specific time period. When ICE agents descended on the business, some employees tried to retrieve their documents from their lockers but were prevented from doing so, the lawyer, Pomerlau, confirmed.

Pomerlau has since filed habeas corpus cases in federal court for each employee, challenging their detainments as unlawful.

On Thursday morning, some drivers honked to show their support for protesters as they passed by the car wash, which sits on busy Cambridge Street.

The first of the protesters to arrive was Janet England, 68, of Brighton, who said she had spent several months protesting ICE over the summer in Waltham. On Wednesday, the day after news of the raid broke, England arrived at the car wash by herself, carrying a sign denouncing the agency.

She said she was spurred on by concern about “people disappearing.”

“I always think that ... when this happens, the community of people that this has happened to feel so alone, it was really for supporting them and letting them know that we care,” she said. “We white people, we community members, we care.”

“It’s not okay. We don’t like it,” she added.

Mitch Ryerson, 70, works near the car wash. On Wednesday, he saw England standing outside when he drove by. When she said she would be back the next day, Ryerson, who lives in Cambridge, decided to join in.

He encouraged people to take time out of their daily lives to notice events around them.

“The people who are really working hard, it’s really good that they’re getting people to think and take notice,” he said.

Boston City Councilor Liz Breadon, who represents the Allston neighborhood where the car wash is located, called the detentions “kidnapping — plain and simple.“

“It is a horrifying chapter in the illegal and vindictive targeting of Boston by ICE and the Trump Administration,” she said.

Whitney Wolff, 71, of Somerville, who stood next to Ryerson, dubbed ICE a “paramilitary group.”

“I think having people here is a whole lot better than just being silenced and acting like this is normal,” Wolff said.

Luis Fieldman contributed to this report.