Six people were killed when a plane crashed into a home in Gaithersburg, Maryland on Monday just before 10:45 a.m..

All three people on the small plane died, including Michael Rosenberg, the CEO of a North Carolina-based biopharma corporation called Health Decisions, Inc., ABC News, said

Late afternoon, the bodies of Marie Gemmell and her two young children, a 3-year-old and a 7-week-old, were discovered on the second floor of the home.

"We don't know at this point if the cause of death was smoke inhalation or something else," Thomas Manger, chief of the Montgomery County Police, said.

A woman who lives near the crash site told a CNN affiliate that she thinks she heard the victims calling for help.

"I heard screams and somebody else beside me heard screams, but we're not sure if it was from inside the house or behind the house. ... We're not completely sure it came from inside the house, but we did hear screams," she said.

The Montgomery County Airpark is about a mile away from the crash scene.

According to the FAA, the aircraft that hit the home, an Embraer EMB-500/Phenom 100 twin-engine jet, was registered to Sage Aviation of Chapel Hill, North Carolina. It was attempting to approach Runway 14 when it crashed.

According to NBC,Tracey Everett was on a nearby road when he witnessed the plane flying very low.

"You could tell he was struggling with the sticks," Everett said of the pilot. "He was trying to pull up; he would gain a little elevation and then drop again."

Byron Valencia, a neighbor, told The Associated Press that he was in his kitchen when he heard the jet engine flying overhead.

"When I opened my window, I could see smoke over the trees and I heard a small explosion, like a pop," he said. "I could see the smoke rising ... It's scary,"

Two neighboring houses were damaged in the explosion and fire.

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