The Trumbull-based company that owns the swing ride that malfunctioned Sunday at the Norwalk Oyster Festival, injuring several children, said Monday it is cooperating with authorities in the investigation.

“Preliminary investigation is that the Zumur swing ride suffered a mechanical malfunction at the Norwalk Oyster Festival,” the company posted on its website. “Our first and only concern is for the well-being of those involved and their families. We are continuing to cooperate with authorities as they investigate into the root cause of the accident.”

The Stewart Amusement website said its rides are inspected daily by trained personnel, weekly by state and local inspectors and annually by professional engineers and insurance company inspectors.

According to the Connecticut Post, 18 people, mostly children, were injured when the ride abruptly stopped. Most of the injured were transported to the hospital, treated and released. One boy remains hospitalized.

The Trumbull-based company has operating since 1983.

“Serving Fairfield and New Haven Counties in Connecticut, and Westchester and Putnam Counties in New York, we have continually strived to provide the newest and safest amusements available,” the company website said.

Stewart Amusement didn’t provide rides at this year’s Trumbull Day, but was used for the town event in past years.