Following the shooting, the Chicago office of the Council on American-Islamic Relations had called on the FBI to investigate it as a hate crime. McCarthy said Wednesday he’s spoken with the bureau, and that although it’s not involved in the investigation, “we are keeping them apprised” of the department’s probe.

"Had it been aimed lower and gone through a window, I personally believe it could have killed someone, if not injured them very seriously. So that is not lost of anyone and is much cause for concern, and fear, really," CAIR-Chicago executive director Ahmed Rehab told WGN

The office had asked the FBI to step in and investigate the incident as a hate crime but had not received a response from the bureau as of late Tuesday, Karoluk said. CAIR also asked Orland Park police for increased patrols around the mosque.

Orland Park police are investigating but the investigation may expand to the federal level as well. The prayer center is working with the Chicago chapter of CAIR in asking the FBI to investigate this as a hate crime.

CAIR said Orland Park police were contacted and are investigating. Orland Park police could not be reached for comment.

No one was hurt when the single shot was fired through the dome of the Orland Park Prayer Center a few minutes after 6 a.m. during the Fajr, or break-of-dawn prayer, according to a statement from the Chicago office of the Council on American-Islamic Relations.

"We need to take these incidents very seriously and that is why we wanted to emphasize for all authorities involved, whether local police or FBI, to look through all the possibilities," said Agnieszka Karoluk, senior communications coordinator, CAIR.

“We’re very happy that no one was hurt and because it happened at such an early time, 6:05 for Fajr prayer, that is when most mosques have the least amount of people in them, at least in the United States because it is so early,” said CAIR spokeswoman Agnieszka Karoluk.

The Chicago office of the Council on American-Islamic Relations (CAIR-Chicago) is calling for an FBI hate crime investigation into the incident.

CAIR-Chicago has contacted the Orland Park Police to request increased security patrols and is asking the FBI to investigate the shooting for a potential bias crime.

“It happened during morning prayers when there were people inside,” Ahmed Rehab, executive director at the Council on American-Islamic Relations (CAIR)-Chicago, told Al Jazeera. “It disrupted the prayer and debris fell down from the dome onto people.”

“Incidents such as this have a chilling effect on worshippers. No one should have to go to their place of worship worried if they’ll make it back home alive,” Ahmed Rehab, executive director of the Chicago office of the Council on American-Islamic Relations, said in the statement.

The Chicago office of the Council on American-Islamic Relations (CAIR-Chicago) is calling for an FBI hate crime investigation after a bullet was reportedly fired early this morning at the dome of the Prayer Center of Orland Park (OPPC) in Orland Park, Il.

Come hear the story of the #MyJihad campaign as told by its founder Ahmed Rehab. Learn how a simple idea on Facebook is turning into what some analysts are calling the most important Muslim counter-Islamophobia campaign ever.

Amina Sharif, CAIR-Chicago’s Communications Coordinator, spoke at an Orland Park townhall meeting on Jan. 15. She presented on a panel with three other leaders from different faith organizations.

CAIR-Chicago's Executive Director Ahmed Rehab spoke on an interfaith panel at St. Michael Parish church in Orland Park on September 18th. The event, entitled “Extremism and Violence in the Name of Religion,” featured Christian, Muslim, and Jewish speakers.

As part of CAIR-Chicago’s Ramadan outreach program executive-director, Ahmed Rehab, will be visiting four mosques in the Chicagoland area to discuss the services that CAIR-Chicago provides to the Muslim community.

CAIR-Chicago hosted its first of two Elderhostel’s Days of Discovery “Building Bridges to Islam” programs at the Prayer Center of Orland Park (OPPC). Nearly 30 participants attended this perennial educational immersion event previously held in Des Plaines and Northbrook. The “Bridge to Islam” program provided participants with informative and interactive presentations, and included a tour of the mosque. Elderhostel, a non-profit organization, facilitated the event as a part of its program to provide extraordinary learning adventures for people 55 and over.