A 45-year-old man died early Sunday morning after crashing into the back of a parked pickup in San Diegos Bay Park neighborhood, police said.

It happened about 1:45 a.m. as the man was headed south on Clairemont Drive near Ute Street, close to Clairemont High School, San Diego police Officer Jose Perales said in a statement.

The man was behind the wheel of a 2004 BMW 645CI sedan when he veered off the road to his right for unknown reasons and struck the back of a Ford F-350 pickup, Perales said. Medics took the gravely injured driver to a hospital, where he died.

Perales said it was not immediately known if alcohol impairment was a factor in the crash, which the departments traffic division is investigating.