Allyson Gump had just left the medical tent after finishing the Boston Marathon when she heard the first explosion.

“The first [explosion] was confusing,” the university alumna said. “But once we heard the second explosion go off, we knew it was bad.”

The bombing killed three people, including an 8-year-old boy, and injured more than 170 during the marathon Monday.

Gump, who graduated in 2008, said she was two blocks away from the finish line when the explosions went off.

“Everyone in our proximity was very scared and nervous and confused, and it became very chaotic very fast,” she said. “Everyone was asking ‘What’s going on?’”

While her boyfriend went to get her bags, Gump said she saw people running and crying. She also said she saw ambulances and police drive to the finish line.

“I had no idea what was going on,” she said. “But I knew it was bad.”

Many people were praying for those who were injured or died, she said.

She also said that her boyfriend told her that he had seen the finish line and a lot of people were running away from it.

He then told her that they had to get away from the scene as quickly as possible.

Gump said she thought the Boston police and medical responders did the best they could and were helpful.

“I think they saved lives from being so quick to the scene,” she said.

Gump said city authorities told people to stay indoors, not to go downtown and not to travel in big groups. Streets were closed as well.

The city was in a state of caution Tuesday and streets were still closed, she said. Security had been increased as well.

There is still an ongoing investigation into the bombings and no one has been arrested in connection with it, according to The Associated Press.