The Harris County Institute of Forensic Sciences has released preliminary information about the four people killed in a fiery helicopter crash Sunday.

Texas officials have revealed the identities of the four victims aboard a helicopter that crashed into a radio tower in Houston, Texas, on Sunday

One of the four victims in Sunday night's fatal helicopter crash in Houston has been identified as Cesar Lerma. Lerma was one of three passengers and the pilot aboard the doomed helicopter that was taking a night tour over downtown Houston when it crashed into a radio tower in the Second Ward and spiraled into a ball of fire before crashing.

Authorities continue to investigate the circumstances surrounding a helicopter crash in Houston on Sunday evening that killed four people on board and sparked a massive flame within sight of homes.

The NTSB says they have obtained the records of the pilot involved in Sunday’s deadly helicopter crash in Houston’s East End.

A local helicopter reporter said the red flashing lights on the radio tower are often out -- and the lighting was reported being out to the FAA on Oct. 17.

The investigation spans an area of at least 4 acres, Houston Police Department Lt. Jonathan French told reporters on Monday. Power outages were reported in the area, Houston Mayor John Whitmire said Sunday. No residents were injured or vehicles damaged on the ground, French also said.

The Harris County Institute of Forensic Sciences has released the names of the pilot and family of three killed in a helicopter crash in Houston.

Federal authorities continued their investigation into the incident Wednesday as questions remain over what led to the crash.