Los Angeles, July 30 -- Three people are missing after an explosion at a plant on Tuesday in Fremont, U.S. state of Nebraska, local authorities and news outlets said.

Troopers, along with multiple fire and police agencies are on the scene of a building fire near East Cloverly Road and South Union Street in Fremont, Nebraska State Patrol said on Facebook.

Fremont Mayor Joey Spellerberg told ABC-affiliated KETV television station that three people were inside the plant when it exploded just before noon.

The blast was reported a few minutes before noon at the location where wood pellets for fuel are made by Horizon Biofuels, Inc., authorities said.

According to official data, the company employs 10 people and is one of three commercial...