A company that helped design a Miami pedestrian bridge that killed at least six when it collapsed Thursday was involved in the construction of at least four bridges in Maine.

FIGG Bridge Engineers, an internationally known firm based in Tallahassee, Florida, helped design the new Sarah Mildred Long Bridge between Kittery and Portsmouth, New Hampshire; the Penobscot Narrows Bridge near Bucksport; the Sagadahoc Bridge in Bath; and Wiscasset Bridge, according to materials promoting FIGG’s involvement in the Sarah Mildred Long project.

The company worked on the Kittery-Portsmouth bridge in partnership with Hardesty & Hanover, a Boston-based engineering firm. FIGG also worked on the Leonard P. Zakim Bunker Hill Bridge in Boston.

Opening the Sarah Mildred Long Bridge has been delayed six months from its original September 2017 opening.

The Maine Department of Transportation has said the lift span bridge is safe and operational. The department recently ordered Cianbro, the Pittsfield construction firm building the bridge, to open it to traffic by the end of March.

Department spokesman Ted Talbot said Maine and New Hampshire transportation departments were preparing a joint statement regarding FIGG’s work it would release Friday.

The pedestrian bridge at Florida International University collapsed onto a busy highway Thursday, killing at least six people and wounding nine others. The 950-ton span was still under construction.

The bridge was built by FIGG and Miami-based MCM Construction Management.

In a statement, FIGG said it was “stunned by the tragic collapse in Miami.

“Our deepest sympathies are with those affected by this accident,” the company said.

“We will fully cooperate with every appropriate authority in reviewing what happened and why. In our 40-year history, nothing like this has ever happened before. Our entire team mourns the loss of life and injuries associated with this devastating tragedy, and all our prayers go out to all involved.”

Crews install the 4 million-pound concrete lift span, center, approximately the length of a football field, on the Sarah Mildred Long Bridge connecting Kittery to Portsmouth, N.H., in 2017. (Jill Brady/Portland Press Herald)