Three people were arrested and more than 4 ounces of cocaine was seized after a suspected drug deal in the South Shore Plaza parking lot Friday, police said

Arrested were Omi Montanez, 35, and his sister Leslie N. Montanez, 31, both of New Bedford, and Naomi L. Quansah, 38, of Abington.

All three were charged with trafficking in cocaine, possession of cocaine with intent to distribute, and conspiracy to violate the Controlled Substances Act.

Omi Montanez was also charged with resisting arrest and with a drug-free school zone violation.

The two women were released on bail and Omi Montanez was held without bail pending their arraignments today in Quincy District Court.

Braintree Deputy Police Chief Russell Jenkins said police officers Matthew Heslam and James Peters were patrolling the mall’s parking lots when they saw someone, later identified as Omi Montanez, acting suspiciously.

Jenkins said the officers kept Montanez under surveillance, and police officer Mark Sherrick and Detective Joseph Molloy were called in to assist.

“Officer Sherrick monitored Montanez’s Nissan Maxima from surveillance cameras inside Lord and Taylor and observed him remove a black, zippered bag from the trunk,” Jenkins said.

Montanez drove from parking lot to parking lot, Jenkins said. An Infiniti pulled into the parking lot where Montanez eventually parked, Jenkins said.

“Upon the arrival of the Infiniti, Montanez exited his vehicle, entered the back seat of the Infiniti and then exited the Infiniti less than a minute later,” Jenkins said.

Suspecting some type of drug transaction had taken place, Jenkins said officers detained all three people as they walked away from the two vehicles.

“Montanez’s vehicle was searched, but nothing was found,” Jenkins said. “The Infiniti was searched and officers discovered a black zippered bag in the back seat containing 125 grams of cocaine.”

When told of the discovery, Montanez fled from the officers, but was apprehended after a brief foot chase, he said.

An additional 3.5 grams of cocaine was found on Leslie Montanez when she was searched at the police station, he said.

Jenkins said that trafficking in 125 grams of cocaine carries a mandatory sentence of 10 years in state prison.