PHILADELPHIA (CBS)—Police are investigating a double stabbing that left one person dead on Friday afternoon in South Philadelphia.

It happened just before 4 p.m. in the 1500 block of South 19th Street.

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Police say a 63-year-old woman and a 67-year-old man were found stabbed multiple times inside their home.

Both victims were found by their son.

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The woman was pronounced dead at the scene, police say.

The man was transported to Penn-Presbyterian Medical Center where he remains in critical condition.

No suspect has been arrested at this time.

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Anyone with any information is asked to call police at 215-686-TIPs.