Eight people have been shot dead, including the shooter, inside of a Texas home on Sunday during a football watch party.

Police officers responded to calls of shots fired at a single-family home in the 1700 block of West Spring Creek Parkway, near Custer Road in Plano around 8pm.

An officer who was nearby responded to the scene and fatally shot the suspect, who was male, authorities said.

Of the officer, who has not been publicly named, Plano Police Department spokesman David Tilley told CBS Dallas: 'He actually heard gunshots and that's when he made entry into the house.

'That's when he observed several victims inside then engaged the suspect. And that's when he shot him.'

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Eight people have been shot dead, including the shooter, inside of a Plano, Texas home on Sunday (scene above)

Police officers responded to calls of shots fired at a single-family home in the 1700 block of West Spring Creek Parkway, near Custer Road in Plano around 8pm (scene above)

An officer who was nearby responded to the scene (above) and fatally shot the suspect, who was male

Two other people inside the home were injured and transported to a nearby hospital (scene above). Their conditions are unknown at this time

Plano Police Department spokesman David Tilley (above) said: 'I've been here all my life. I've never heard of anything like this.'

It was not immediately clear if the shooter knew the victims.

Two other people at the home were shot and have been hospitalized; their conditions were not known.

The identities of the victims or the shooter have not been released.

No officers were injured in the incident in Plano, which is a suburb north of Dallas.

'I've been here all my life,' Tilley told the Dallas Morning News. 'I've never heard of anything like this.'

Authorities said all of the victims were adults. A motive for the shooting has not been released, as police are still investigating.

The shooting reportedly happened during a Dallas Cowboys watch party.

It was not immediately clear if the shooter knew the victims. The identities of the victims or the shooter have not been released (scene above)

Authorities said all of the victims were adults. A motive for the shooting has not been released, as police are still investigating (scene above)

Witness Crystal Sugg, who works nearby the scene, described what she witnessed outside of the home before the shooting started to Allison Harris, a reporter with Fox 4.

Sugg said she saw a man arguing with a woman outside of the home and said you couldn't really hear what the disagreement was about.

'And as they were arguing, the woman was trying to go back in,' Sugg said.

'As she was going back in the house, you see the man pull out his gun and started releasing.

'So as he released, I ran back in because I didn't want to get hit by nothing.'

Steven Featherland said he heard between 30 to 40 rounds go off at the scene of the shooting.

'I pulled up and cops were already positioning themselves,' Featherland told the Fox4 News reporter.

The shooting reportedly happened during a Dallas Cowboys watch party at home in the 1700 block of West Spring Creek Parkway, near Custer Road (file above)

Crystal Sugg describes the altercation she saw between shooter & a woman before shooting started in Plano. pic.twitter.com/U9yqdkN2Kh — Allison Harris (@AllisonFox4News) September 11, 2017

'I heard you know the first couple of shots and we came outside. Next thing you know all you heard was pop, pop, pop, pop... there was like 30, 40 rounds. That's when we both went inside.'

It is not clear if those shots also include the bullets fired by responding police officers.

Another neighbor, Lauryn Nichols, is shocked by the incident and said she had a friend who was in the house.

Nichols said she's not sure if her friend made it out before the shooting or not.

'I'm worried,' Nichols told the newspaper. 'It's like one big family here in Plano.'

More than 30 police officers were at the scene Sunday night continuing to investigate, the Dallas Morning News reported.

Police were expected to be at the home throughout the night, the newspaper reports.

The Texas Rangers were responding to the scene to lead the investigation because a Plano officer was involved, according to the newspaper.