An unidentified man was struck by a van in the 1600 block of South Seacrest Boulevard, police said. The man, thought to be between 18 and 24 years old, ran in front of the van shortly after 5 a.m., police said. The man suffered serious head injuries and was taken to Delray Medical Center. Police sent two Spanish-speaking officers to knock on doors in the Seacrest Boulevard area in an attempt to find anyone who can identify the injured man. The van driver, whose name was not released, was not cited for driving violations, police said.