A 22-year-old man died in a single-vehicle crash early Thursday morning, according to Omaha police.Around 2:57 a.m., officers responded to a crash near 151st and Z streets, authorities said.Omaha police said a Nissan Murano was traveling eastbound on Z Street, left the roadway and struck a tree.The victim, identified as Alexander Locum, was pronounced dead at the scene by first responders, according to Omaha police.The crash is still under investigation.Get the latest headlines from KETV NewsWatch 7