|Updated: 1/22 6:42 pm
||Published: 1/22 4:30 pm
University of Oklahoma students were back in class and walking around freely by Wednesday evening.
Police and SWAT teams left campus around 2 Wednesday afternoon after they found no evidence of a shooting at Gould Hall.
Around 11 a.m. there was a report of a shooting in the area, which led to a lock down on campus.
OU President David Boren thinks construction in the area could be behind the noise thought to be gun shots.
Boren said the initial call came from a faculty member who said they heard three shots near Gould Hall.
Even though there was no shooting Boren said the faculty member did the right thing. This happened during a busy time on campus and there were many students around.
Many of them got text messages and emails telling them there was a shooting and to stay inside. People in Gould Hall were evacuated.
FOX23 spoke with several students, including Tulsa native Anna Sullivan, who described what she and her classmates were going through.
"People are freaking out. Saying there is a shooting. I start freaking out. I just noticed there were a lot of people running around outside. It was kind of chaotic and confusing for a while," said Sullivan.
"I didn’t understand the gravity of the situation because I was still looking for parking, until I saw a huge line of police cars and ambulances," said another student.
During his news conference, Boren said he was proud of how the university's emergency alert system worked.