A 43-year-old man was stabbed in the chest while trying to break up a fight on a party bus early Sunday in the Potrero Hill neighborhood, police said.
The wounded man, who was assaulted with a knife around 2:52 a.m. at the 900 block of Connecticut Street, where the Potrero Terrace housing project development is located, is expected to survive.
The suspected stabber is an unknown man. Police have not made an arrest as of Monday morning.
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