HOUSTON – Police are investigating three unrelated shootings Monday in southeast Houston that killed two and injured six.

All of the shootings happened within about an hour of each other and only miles apart.

Here is what police have said about each of the shootings.

Schley Street shooting

The first shooting was reported about 4 p.m. at a home at Schley and Delmas streets.

Houston police Chief Art Acevedo said officers found one man dead. He said two other people were taken to a hospital in Clear Lake for treatment.

Acevedo said it appears gunfire was exchanged inside the home, which is known for "unusual" and "illegal" activity.

The chief said police are looking for a gray or silver four-door sedan that was seen leaving the scene after the shooting.

Northridge Drive shooting

The second shooting, which was also a shootout, was reported about 4:15 p.m. at the corner of Northridge Drive and Jutland Road.

Houston police Executive Assistant Chief Troy Finner described the shooting as gang-related.

Finner said a brown car with three men inside stopped in front of a home with four people standing in the driveway. Someone inside the car opened fire, hitting all four people in the driveway, Finner said. One of those people died, Finner said.

Finner said someone in the group of people returned fire at the brown car, which was found abandoned a few blocks away. Evidence in the car led investigators to believe someone in the car was shot, Finner said.

Finner said it is believed that the people in the brown car jumped into a gray or silver car and fled the scene.

Broadway Street shooting

The third shooting was reported about 5:20 p.m. in a parking lot at the corner of Broadway and Rockhill streets.

Video from SKY 2 above the scene showed emergency workers attending the victim in the parking lot. Police could also be seen taking someone into custody.

Investigators said the gunman in this case claimed the shooting was in self-defense.