PHILADELPHIA (CBS) — Police are investigating a triple shooting that left one person dead and two others injured.

It happened around 2:30 pm at the 3200 block of East Street.

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Police say a 46-year-old man was shot once in the chest and was taken to Temple Hospital. He was pronounced dead just before 3 pm.

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Police say a 33-year-old man suffered a gunshot wound to the back and was also taken to Temple Hospital where he is in critical condition.

A 59-year-old man was shot once in the left arm and twice in the left side of his chest, according to police. He was taken to Temple Hospital in stable condition.

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Authorities describe the suspect as a black male wearing a white tee-shirt and blue shorts. He is armed with a rifle.