Boston Police seized 100 grams of crack cocaine and more than $1,000 after witnessing an alleged drug sale Wednesday.

Officers said they observed what they believed was a street-level drug transaction at a gas station on Tremont Street.

Police say they stopped a person they suspected was a purchaser and recovered a plastic bag of cocaine.

The suspected seller left the gas station in a vehicle, which police stopped in the area around 41 Smith St.

Police say they arrested the driver, who they identified as Lance Gerald, 38, of Boston, and charged him with trafficking cocaine and distributing a Class B drug.

Officers say they recovered two plastic bags containing about 100 grams of cocaine, drug packaging materials, and a scale. A vehicle search also allegedly produced three cell phones and $1,115.

Gerald is expected to be arraigned in Roxbury District Court.

Incident Summary

The Boston Police Department responded to 196 incidents in the 24-hour period ending at 10 a.m. Thursday, according to the department’s incident log. Those included arrests for one robbery, one aggravated assault, one residential burglary, 14 larcenies, and three auto thefts.

Arrests

All of the below-named defendants are presumed innocent until proven guilty.

— Melissa Barker, 355 Geneva Ave., Dorchester. Uninsured motor vehicle.

— Patrick Scannell, 12 Codman St., Dorchester. Vandalizing property.

— Diamante Serrano, 8 Mercer St., South Boston. Warrant.

— Jeilani Exilhomme, 363 Adam St., Dorchester. Possession of a Class B drug.

— Aaron Mckethan, 112 Southampton St., Roxbury. Drinking alcohol in public.

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— Scott Ohara, 62 Marshfield St., Roxbury. Warrant.

— Irma Seda-Feliciano. 51 Norton St., Dorchester. Selling, possessing an electric stun gun.

— Shavonne Manor, 19 Walnut St., Arlington. Assault and battery.

Boston Police seized 100 grams of crack cocaine and over $1,000 at a stop Wednesday. (Courtesy/Boston Police)