ST. PAUL, Minn. - A burger and malt institution is closing its doors.

The St. Clair Broiler, which first opened its doors in 1956, was one of the first restaurants to offer open-flame broiled burgers and quickly became a popular spot for locals.

The restaurant, located in the Mac-Groveland neighborhood, posted the news on Monday on its Facebook page, citing economic reasons for their closure.

"We busted our butts to make it work, but today's economics make it almost impossible to run a single, independent, family owned and operated restaurant at a profit," the post states.

According to co-owner Jimmy Theros, staying open would mean $200,000 in upgrades to a building they don't own.

"We decided it was time for us to move on," Theros said.

Just last weekend, another staple closed after more than 50 years. The original Red's Savoy Pizza on East Seventh Street in St. Paul closed Saturday. That building also needed major upgrades. However, more than a dozen other Red's Savoy Pizza locations remain open.

"That was a regular place for us, as well," said Kevin Ryan, who worked at St. Clair Broiler as a teenager more than 50 years ago.

Ryan recalls Hubert Humphrey coming in to the Broiler for coffee almost every morning when he was a professor at Macalester College.

"I'd like to thank the community, thank the people of St. Paul and the Twin Cities area for supporting us for so many, so many years," Theros said, also thanking his staff.

The iconic restaurant will serve its last burger and malt on Sept. 30.

The family who owns the St. Clair Broiler also runs Rudolph's Bar-B-Que in Minneapolis.