UPDATE (11/27/15, 7:20 p.m. EST): Police have now arrested the suspect in Friday (Nov. 27)'s shooting at the Colorado Springs Planned Parenthood clinic which left 11 injured and hospitalized, including four police officers.

In a statement, Planned Parenthood called the attack an act of "domestic terrorism."

UPDATE (11/27/15, 5:10 p.m. EST): The man who opened fire on the Planned Parenthood of Colorado Springs, Colorado on Friday is still barricaded inside of the clinic, and at least five civilians have been injured, along with four police officers.

The shooter is described as a bearded man wearing hunting gear and carrying an "assault-style weapon."

Police officers reportedly were able to sneak into the building and rescue six to seven civilians who were hiding in a bathroom.

UPDATE (11/27/15, 4:49 p.m. EST): The number of police officers injured in the shooting at Colorado Springs' Planned Parenthood clinic has reportedly now risen to four, with an unknown number of civilian victims also possible.

Hospital officials told CNN that at least six people have been transported to area hospitals for treatment to their injuries, the degrees of which have not been revealed.

Police are still in pursuit of the shooter, reportedly having exchanged gunfire with the suspect as he or she remains inside of the clinic.

PREVIOUSLY: The Planned Parenthood clinic in Colorado Springs, Colorado came under attack by an "active shooter" on Friday (Nov. 27), injuring at least three police officers.

Speaking to CNN affiliate KKTV, Katherine Buckley of the Colorado Springs Police Department said that as of 3:33 p.m. EST, police had not detained the suspect who opened fire near the clinic.

"It's still an active situation," she explained.

"We're not sure of what the connection is to Planned Parenthood, but that was the original address that we received for call to service. We can't confirm where the shooter is at at this point ... We're still trying to confirm where the shooter is at at this point, that's why this is still very much an active situation."

As of 5:21 p.m. EST, per the Associated Press, police have still not been able to detain the suspect and reportedly "encountered gunfire" in their pursuit of the CSPP shooter.

Additionally, the police spokeswoman admitted that neighboring businesses still had people inside of them and said that there is a possibility that the gunman has taken hostages.

"We have put officers and detectives into the different businesses at this point ... There is that possibility [of hostages being taken]. There are a lot of possibilities with this scenario."

Witness accounts from the area described hearing as many as 20 shots in the span of five minutes.

Two of the officers who were injured have reportedly been evacuated.

Stay tuned for updates as this story develops.