BRENTWOOD (CBS SF) — A man is in custody on suspicion of driving under the influence of alcohol following a crash that left a teenager injured in Brentwood on Tuesday afternoon, police said.

Officers arrived to the scene of a vehicle vs. pedestrian collision around 3:27 p.m. at Brentwood Blvd. and Fir St. The crash caused the roadway to be closed for nearly two hours.

READ MORE: Hertl’s Hat Trick Leads Sharks Past Flames, 5-3

Investigation revealed that the 14-year-old victim was walking along the shoulder of Brentwood Blvd. when he began suffering a medical emergency. The victim began moving into the southbound lane of Brentwood Blvd., where he was struck by a Ford F250 truck.

READ MORE: COVID: High Demand For Vaccines, Boosters Strains Staffing At San Mateo Clinic

The victim’s injuries at the scene were moderate, police said, but he was flown to Oakland Children’s Hospital.

MORE NEWS: Firm Once Owned By 'Pharma Bro' Shkreli To Pay $40 Million To Settle Price Gouging Lawsuit

The driver, a 58-year-old male from Brentwood, remained on the scene as police conducted a DUI investigation. He was taken into custody after authorities performed sobriety tests.