How to survive an attack at the Boston hospital: A guide

As the marathon bombings near, there’s a new look at the worst attacks in Boston history.

The Boston Globe reports the attack on the Massachusetts Institute of Technology hospital was the deadliest on record, and was the first on a public hospital since the attack that killed 130 people on the Pentagon on Sept. 11, 2001.

More than 70 people died in the attack.

The Globe reports that some hospitals and other public institutions were set on fire in the attacks, including Boston University Hospital, the Massachusetts General Hospital and the Northeastern University Medical Center.

Boston Mayor Marty Walsh, a Democrat, says he was not at the hospital when the bombs went off, but he did witness the aftermath.

He says the hospital is one of the few in the country that is still open.

He says the bombings were the most deadly in the city in recent memory.

“The bombs went down on the main floor of the Boston University Medical Building, the building where the patients were being kept, and we saw them going up and down, just in that direction,” he told ABC News.

“I was actually able to run around the perimeter of the building and make my way around to the second floor.”

Walsh says the city of Boston was a place where the people felt safe and people could be themselves.

“We have a great safety net here.

We have people coming and going, working, volunteering.

There’s a great sense of safety here,” he said.

Walsh said the city is also a place that has had a lot of support, from law enforcement, from businesses and community groups.ABC News’ Alex Koller contributed to this report.