Comerica and Bank of America closed their downtown Dallas headquarters on Friday, amid an investigation into the fatal shooting of five police officers, which took place nearby.

The shooting took place Thursday evening, during what had been a peaceful rally of about 800 people against the police shootings of black men in Louisiana and Minnesota. At least one suspect – who was killed by police – carried out the ambush from an elevated position, according to the Dallas police department.

Five officers were killed; seven officers and two civilians were injured.

Streets surrounding the two bank towers were closed Friday morning, as police investigated the scene.

Bank of America Plaza is at 901 Main Street, adjacent to the crime scene. The Comerica Bank Tower is about five blocks east, at 1717 Main Street.

Employees at both locations were instructed this morning to make alternative working arrangements, spokespeople for both companies said.

The Comerica headquarters – home to 400 employees – is expected to open Monday, a spokesman said. The location also includes a retail banking center.

"We are saddened by the loss of life and extend our deepest sympathies to the families of the slain officers and those injured in this terrible tragedy," the Comerica spokesman said.

A spokeswoman for Bank of America declined to say how many employees work at the bank's downtown headquarters.

"We extend our deepest sympathies for the slain and wounded officers and their loved ones," the spokeswoman said.

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