A woman tried to light a flag on fire amid crowds that had assembled for Philadelphia's Pride parade Sunday, police said.

ReeAnna Segin, 18, of Woodbine, N.J., was arrested around 12:10 p.m. at 12th and Locust Streets, authorities said. Photos taken by freelance photographer Bastiaan Slabbers showed the arrest.

Segin is led away by police
BASTIAN SLABBER / For the Inquirer
Segin is led away by police
Police hold the flag.
BASTIAN SLABBER / For the Inquirer
Police hold the flag.

While flag burning is not illegal, police said Segin tried to set the blaze amid a crowd. She was charged with attempt to commit arson, risking a catastrophe, recklessly endangering another person, and possessing an instrument of crime, police said.

The District Attorney's Office on Wednesday dropped the arson and catastrophe charges — both felonies — but said Segin still faces the remaining charges, which are misdemeanors. Officers found road flares protruding from Segin's backpack, which also contained a can of paint thinner and a blue lighter stick, authorities said.

Police described the flag she allegedly tried to burn as a "a thin blue line American flag." It had black and white stripes along with a blue stripe. On social media, some people referred to it as a Blue Lives Matter flag.

Anna Moore/Twitter

Blue Lives Matter, a movement to honor police officers, was created in response to Black Lives Matter, a movement that has called out police killings of people of color.

Amber Hikes, Philadelphia's LGBT affairs director, said Monday evening on Facebook that she helped post Segin's bail. Hikes also said Segin, a transgender woman, had been sent to a men's prison before being bailed out.

For the sake of transparency: Yesterday at the beginning of the Pride parade, a trans woman was arrested at 12th and…

Posted by Amber Hikes on Monday, June 11, 2018

Some people, including the Facebook group Philly Socialists, questioned the arrest and rallied in support of Segin.

“The police have no place at Pride,” Philly Socialists said in a post Monday afternoon. “Police represent an affront to LGBTQ people and people of color, many of whom have who have died at the hands of police.”

A police presence is routine at city events like parades where large crowds gather.

Press contact: press@phillysocialists.orgOur statement regarding our comrade's arrest:On Sunday June 10, a comrade,…

Posted by Philly Socialists on Monday, June 11, 2018

As of Monday, more than $1,800 had been raised to help Segin with court fees and other charges. Philly Socialists said it and another group, Philly for Real Justice, were assisting Segin.

Police say Ryan Segin, 18, tried to burn an American flag at 12th and Locust streets, where the city's LGBT community was celebrating the Pride parade on Sunday.
Philly Police
Police say Ryan Segin, 18, tried to burn an American flag at 12th and Locust streets, where the city's LGBT community was celebrating the Pride parade on Sunday.

Editor's note: Police publicly identified the suspect by her birth name, Ryan Segin. The name she uses as a transgender woman is ReeAnna Segin. The Inquirer and Daily News have updated this story to identify her as ReeAnna.