Police say they believe a Covina man shot his wife then turned the gun on himself during an argument in their home on Wednesday.

A granddaughter of the couple called police at 4:46 p.m. after she head the arguing and gunshots and then smelled smoke, Covina Sgt. David Rodriguez said. The girl and her two sisters then fled to a neighbor’s home.

Authorities have not released the couple’s names.

Responding officers discovered a man and a woman dead in a locked bedroom of an apartment in the 200 block of East Center Street and found a gun at the scene.

The couple was the legal guardians of their three grandchildren, the sergeant said, having adopted the girls. The youngest is six years old and the oldest is a teenager.

Rodriguez said the children are with other family members now.

It’s not the first time police have been called to the couple’s home.

Officers went to there twice on the same day in November, Rodriguez said. The couple had been arguing. It appears that the wife made the first call to police and wanted advice. The second time police showed up, the sergeant said, was to keep the peace. The man was trying to get some of his property.

No arrests were made.