PHILADELPHIA (CBS) – Police say two brothers were gunned down in Southwest Philadelphia early on Tuesday morning while they were on their way to work.

Philadelphia police say gunfire broke out just after 5:30 a.m. on the 6500 block of Kingsessing Avenue.

A neighbor told CBS3 that they saw outside the window two men lying in a pool of blood after the shooting.

A 50-year-old man was shot in the head and pronounced dead at the scene.

Another man in his 50s was shot multiple times and was taken to Penn Presbyterian Medical Center in critical condition, where he later died.

The shooting happened while other relatives were just steps away inside the family home.

“At this point we do not have any clearer idea as to motive,” said Philadelphia Police Capt. John Ryan.

One motive authorities have ruled out though is robbery as nothing was taken from the two men.

The shooting remains under investigation, but authorities say they are trying to pull surveillance video and find witnesses.

“We are looking for anyone in the neighborhood that had seen anybody around that time of day or has any information about who may have done this, to contact the homicide unit,” Ryan added.