PHILADELPHIA (CBS) — Philadelphia police are looking for a suspect in a double stabbing.

It happened on the 1100 block of Fillmore Street in Frankford, just after 2 a.m. Wednesday.

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Police say the victims, a 20-year-old and a 17-year-old, are siblings.

They were stabbed while defending their mother from her ex-boyfriend.

Both are in stable condition.

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