(CNN) Gunfire shattered a neighborhood cookout in West Baltimore early Sunday night, leaving at least one person dead and seven injured, police said.

Authorities need the public's help identifying the gunman and more possible victims from the "tragic, cowardly" shooting, Baltimore Police Commissioner Michael Harrison said in a news conference.

"It is only with community help that we will be able to identify who did this and hold them accountable."

A gunman opened fire in the middle of cookouts on both sides of the 2500 block of Edmondson Avenue Sunday.

The gunman approached an intersection where cookouts were taking place on both sides of the 2500 block of Edmondson Avenue, Harrison said.

The gunman started "firing indiscriminately into the crowd, striking a number of people," Harrison said. He may have been targeting one or more people in the crowd.

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