Philadelphia officials imposed a citywide after-dark curfew on Wednesday, seeking to avert a third night of violence amid protests over the fatal police shooting of a Black man wielding a knife and described by family as undergoing a nervous breakdown.

A man was killed and another critically injured in a shooting early Saturday morning in Philadelphia’s Olney neighborhood, police said. Police told NBC10 that officers responded to reports of a shooting on the 400 block of West Grange Avenue just before 5 a.

A Philadelphia police officer was fired upon while trying to rescue a gunshot victim inside a North 10th Street home, authorities announced on Monday, Oct. 6. Officer Rafael Abreu-Santana, 36, of the 25th District,