A young man and a boy were arrested on suspicion of selling illegal fireworks in Chinatown on Monday night, Sgt. Danielle Newman said.
The 18-year-old suspect, identified by police as San Francisco resident Eric Au Yeung, and his 15-year-old partner were reportedly selling illegal fireworks on the street in the 900 block of Grant Avenue just after 8 p.m., Newman said.
Undercover officers from Central Police Station who were observing the sales activity approached the suspects and bought some the alleged contraband.
The two were then taken into custody.
The police bomb squad was called to the scene and took control of the explosives.
Yeung was booked on six felony counts, including three counts of sale or transport of a destructive device, conspiracy, child endangerment and committing a crime while out on bail. The 15-year-old was booked on four felony counts.
Both remain in custody.
Central Station conducts enforcement activities like this every year leading up to the Fourth of July, Newman said.