Two females are dead and another wounded in separate but similar shootings Wednesday in North Charleston, police said.

Shortly before 7 p.m., police officers responded to a home on Ventura Street. They found a female who had been shot unresponsive on the floor inside of the house, said police spokesman Spencer Pryor

She was pronounced dead at the scene, he said. A family member inside of the house told investigators that gunshots were heard and the victim was found lying on the floor. Shell casings were found in the front yard, Pryor said, and it appears the front of the house was struck by bullets.

The shooting and two earlier ones on New Year's Day remain under investigation. Police have not made a connection between them.

Shortly before 5 a.m., officers responded to a residence on Aintree Street for a report of a shooting, Pryor said.

Officers found the victim inside the residence near the front door with gunshot wounds. The victim told police she heard a knock at the door and then heard several rounds of gunfire. She was taken to Medical University Hospital. Information about her condition was not available.

Also, just before 5 a.m., officers were dispatched to Niagara Street for a reported shooting. The victim, a woman, was found inside the front door with gunshot wounds. She was rushed to MUH, where she later died.

The woman's son told officers he heard knocking at the front door and when his mother went to answer the door, he heard several rounds of gunfire.

The identities of the victims were not released. A call to the Charleston County Coroner's Office was not returned.

Late Wednesday, police had no information about suspects in the cases and no information that the shootings are related.