Detroit police are looking for a 26-year-old man who is accused of killing two people Sunday night.

Police said the man got into an argument with his 51-year-old girlfriend's granddaughter in a home on Archdale Street. When two other men stepped in to stop it, the 26-year-old allegedly opened fire on them -- killing them.

The gunman and his 51-year-old girlfriend then took off.

Police said they could be driving a 2001 burgundy Chevy Impala with Michigan license plate CPL 5914.