(CNN) –– An airport spokesman told CNN that the United Airlines flight to Honolulu had to return to Denver International Airport on Saturday after having an engine problem.

A spokesman said the plane returned safely to the airport around 1:30 p.m., local time. There were 241 passengers on board, including crew members.

About 20 minutes after police arrived at Broomfield, Colorado Tell me via Twitter They received information that the plane, which was flying over the suburbs of Denver, had a mechanical problem and “threw garbage in various neighborhoods around 1:08 p.m.”

“There were no reports of injuries at this time,” the tweet said.

Other police records have landed in Commons Park, Northmore and Red Leaf areas of the city, about 25 miles north of Denver and 30 miles east of Denver International Airport.

Authorities have not yet firmly linked the two incidents. However, the Federal Aviation Administration (FAA) confirmed in a statement that the Boeing 777-200 returned safely to Denver International Airport “shortly after take-off after experiencing a proper engine failure.”

“The FAA is aware of reports of debris near the aircraft’s runway,” the statement said.

Contact CNN United Airlines for more information.

Broomfield police have warned residents not to touch or move the plane if they see debris in their yard.

Kieran Cain told CNN that they heard a loud crash when a plane flew upwards while he was playing with his children at a local elementary school.

“We saw it, we heard the big bang, we looked up, there was black smoke in the sky,” Cain told CNN.

“The debris started raining. It was like floating. It wasn’t very heavy. But if you look at them now, they ‘are huge pieces of metal everywhere,” he said.

“I was amazed that the plane continued unhindered, without really changing its trajectory or doing anything,” he said. “It’s nothing.”

Cain said he and his sons took refuge when the debris fell.

CNN’s Pete Mundian contributed to the report.