One person was killed and as many as six others were injured in a shooting Monday night at a Halloween party in a home in Kansas City, Kansas, police said.Between 70 to 100 high school-aged students were gathered at the home when the shooting happened, Kansas City Police Chief Karl Oakman said during a news conference, according to CNN affiliate KMBC.The shooting was reported just after 9 p.m., when a group of uninvited guests were asked to leave the party, the chief said.At least one person in the group began firing into the crowd at the party, according to Oakman.Information about the party had been posted on social media, and it was “invite-only,” Oakman noted."