Someone air-dropped a photo of a swastika to Oak Park and River Forest High School students' cell phones at an assembly Friday morning, a spokeswoman for the school said.
"Administration and security are aware and are in full investigation mode," OPRF's Director of Communications Karin Sullivan said in an email alerting students' families of the incident. "Thanks to so many of you for your vigilance in reporting this immediately."
It marked the third racist and anti-Semitic incident at the suburban school in less than two weeks.
Earlier in the week, graffiti was discovered in a girls' bathroom that called for the deaths of “blacks (and) Muslims,” alongside a swastika and the phrase "gas the Jews."
"I went through the entirety of Monday absolutely fearful for my life," student Jordan Murray said.
The week before, another graffiti message was scrawled on a shed at the school, with the phrase "white power" and two swastikas - this one directed at special education teacher Anthony Clark.
“Whoever wrote that, they want you to be afraid,” he said of the message.
In the wake of the first two graffiti incidents, school officials held a packed town hall meeting Wednesday evening in hopes of bringing the community together to "eradicate intolerance and hate," district Superintendent Joylynn Pruitt-Adams said in an email.
Clark, along with other faith and community leaders, were front and center at Wednesday's meeting as the school, students and parents looked to put a stop to the hateful incidents.
Pruitt-Adams said in her email after the second message was found that the school immediately reported both incidents to the police, as well as launched its own investigation, reviewing hours of security footage in an attempt to identify the perpetrators.
School officials said they would provide more information about Friday's incident as soon as they were able.