Police spokesman David Tilley said the shooter was killed by the first responding officer after an exchange of gunfire. The officer was not injured.

"We're trying to put all the puzzle pieces together," David Tilley said.

It is not yet clear what motivated the attack in the suburb of Plano, or if the gunman knew the victims.

he local Dallas News reported that those killed had been watching the Dallas Cowboys, an American Football team, when the violence unfolded.

The outlet quoted a neighbour, Stacey Glover, who said there had been a game-watching party at the property that started early in the afternoon, with people laughing and grilling food outside.

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Spencer Hight, 32, shot dead 27-year-old Meredith Hight and seven of their friends at his former home in Plano on Sunday night.

The other victims were identified by police on Tuesday as

Myah Sade Bass, 28;

Antony Michael Cross, 33;

Olivia Nicole Deffner, 24;

James Richard Dunlop, 29;

Caleb Seth Edwards, 25;

Darryl William Hawkins, 22; and

Rion Christopher Morgan, 31.

Monday would reportedly have been the couple's wedding anniversary, but they had separated in March.

Police said the gunman died after being shot by a responding officer following an exchange of gunfire.

Two further shooting victims are in hospital after they were injured at the property on Sunday night

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