(FOX NEWS NETWORK) -- Explosions and gunfire rang out at American University of Afghanistan in Kabul on Wednesday in what a police commander described as "a complex attack."

Reporters in the area said students and teachers took cover in classrooms as police and special forces surrounded the campus. The numbers of people dead or injured were unclear, but ambulances reportedly raced victims to a nearby hospital. The university's president confirmed the campus was under attack.

Associated Press photographer Massoud Hossaini tweeted: "Help we are stuck inside AUAF and shooting flollowed by Explo this maybe my last tweets"

One student told AFP over the phone, "We are stuck inside my class with other students. I heard explosions and gunfire is going on close by."

The university was established a decade ago, and claims an estimated 1,700 students are enrolled there.

Two of its professors were kidnapped at gunpoint in Kabul on August 7. The professors were identified as Kevin King, an American, and Timothy Weeks from Australia. Men in military uniforms reportedly abducted them as they traveled between the campus and their home in Kabul. The professors' whereabouts are unclear.

Fox News' Lucas Tomlinson and The Associated Press contributed to this report.

Stay with WDRB News. We'll update this story as it develops.

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