Two friends sitting on a porch in Olney on a rainy Monday night were murdered in cold blood when a man approached them and fired several shots at point-blank range, police said.

Cops were called to Sparks Street near 3rd at 8:30 p.m. for the shooting and found a man and a woman, both 21, suffering from gunshot wounds to the chest and head. After he was shot, the man had jumped the wrought iron fence and attempted to run down the street, but made it only about the length of four houses before collapsing in the middle of the narrow street, according to investigators. He was pronounced dead there at 8:34 p.m.

The woman fell to the ground on the porch and was taken to Albert Einstein Medical Center, but doctors were unable to save her. She was pronounced dead at 9:37 p.m.

Investigators said the porch was covered in blood and shattered glass from a table that had been damaged in the mayhem. At least five shell casings were found at the scene, along with bullet fragments, cops said.

Police were looking for a young black man in a gray hooded sweatshirt and dark blue jeans who was last seen running northbound on 3rd Street toward Godfrey Avenue from the shooting scene, and were also looking for an older model gray Ford Taurus with a black hood that may have been connected to the double murder.

The 18-year-old sister of the man who was shot dead, who authorities said is eight months pregnant, was inside the house at the time of the shooting. She was not hurt, but officials said she was so shaken by her brother's violent murder that she may have gone into labor. She was taken to the hospital by medics as police investigated the double homicide.

Distraught family members gathered on the corner of 3rd and Rosemar streets in the wake of the killings, embracing each other and sobbing.

Contact Morgan Zalot at 215-854-5928 or zalotm@phillynews.com, or follow on Twitter @morganzalot. Read her blog PhillyConfidential.com.