Four people died in a structure fire early Thursday in the Ogden community of Riley County, authorities said.

The fire was reported at 3:43 a.m. Thursday at a residence at 208 Riley Ave. Initial reports indicated four individuals were trapped inside the residence.

Riley County Fire Department Chief Pat Collins said first-arriving crews found heavy smoke coming from the two-story structure.

Collins said crews entered the building and performed a search-and-rescue operation as they worked to extinguish the fire.

Collins said firefighters quickly removed one individual from the building. Three more people were found when crews entered the structure again.

All four people were pronounced dead at the scene, Collins said.

The owner of the residence is listed as Roger Harris.

The cause of the blaze is being investigated by the Riley County Fire Department, the  Riley County Police Department, the Kansas State Fire Marshal's Office and the Manhattan Fire Department.

Crews from the Ogden, Riley County and Manhattan fire departments responded to the blaze.

Ogden, a town of around 2,000 people, is located approximately 10 miles southwest of Manhattan on K-18 highway.

This story is developing and will be updated.