On Sunday night, police say, they recovered 17 spent 9 mm shell casings.

Kruse told the Post-Dispatch on Tuesday morning that officers had “a pretty good lead” but so far had made no arrests. They don’t know a motive. Officers worked overnight Monday into Tuesday morning in their investigation.

The red brick complex, at the corner of Commonwealth and Greenwood Boulevard, has eight units and no name.

Kruse described the neighborhood as “relatively quiet.”

Police are checking with businesses along Greenwood for surveillance video that might show the shooter’s vehicle. Kruse said a witness on Sunday saw a red or dark-colored car, possibly a Kia Soul, heading south on Commonwealth and turning onto Tennyson Square.

An officer on patrol Monday night had his window down and heard the gunfire, Kruse said. At the same time, a call to police reported shots fired in the 7300 block of Flora Avenue. Police couldn’t find a shooting scene on Flora but found the scene just over the railroad tracks on Commonwealth, where they had been the night before for Sunday’s shooting.

Police asked anyone with information to call the Maplewood Police Department at 314-645-3000.