HOUSTON — A man was shot to death at a gas station in northwest Harris County Tuesday evening, according to Harris County Sheriff Ed Gonzalez.

It happened at an Exxon gas station off the Northwest Freeway and Spring Cypress Road.

Gonzalez said a man approached another man for unknown reasons. The initial man kept following the other around the parking lot.

The man being followed took a gun out and fired at the other, striking him, according to Gonzalez.

He was pronounced dead at the scene. The alleged shooter stayed at the scene.