Fairfax County police said Uriel Josaphat Espinosa Cruz,18, has been arrested in the death of a teenager who was shot last month in the Centreville area. (Fairfax County police photo)

A suspect has been arrested in the fatal shooting of a teenager last month in Fairfax County, the police said.

Matthew Ortega, 17, was found in the 13500 block of Jeb Stuart Square in the Centreville area on Feb. 14, the police said. He had been shot once in the upper body.

Police said Tuesday that Uriel Josaphat Espinosa Cruz, 18, of Fairfax, was arrested “for murder and use of a firearm in the commission of a felony. “

No motive has been given in the shooting, but it was not thought to be a random incident, the police said. They said their investigation was continuing.

Ortega lived near where he was found. In a message posted online shortly after his death, family members described him as a son, brother and uncle, and said he was loved by many.