A drug sting in Dartmouth and the search of a Halifax home have resulted in four people facing a number of drug and weapons charges.

Police say it started when they pulled in behind an SUV on Wyse Road at about 7:30 p.m. Thursday after seeing what they believed to be a drug deal involving a man and woman in the vehicle.

As officers approached, police say the driver drove into a concrete wall and then backed into an unmarked police car.

The SUV tried to pull away again but another police vehicle blocked it.

The driver, Gerald McNamara, 47, was taken out of the vehicle and arrested, along with Michelle Marie Walsh, 45.

Crack cocaine and cash were seized.

Police later went to a home on Cutter Drive in Halifax and arrested Joan Robart, 65, as she left the house allegedly carrying crack cocaine.

Inside the home, Doreen Louise McNamara, 46, was also arrested, while another woman was released without charges. Police say they seized crack cocaine, a handgun with ammunition, a rifle, shotgun ammunition, drug paraphernalia and cash.

Gerald McNamara and Walsh were charged with drug possession for the purpose of trafficking in relation to the Wyse Road arrests. McNamara was also charged with resisting arrest and assaulting a police officer.

After the Cutter Drive home was searched, Gerald and Doreen McNamara and Robart were each charged with two counts of possession of a weapon dangerous to the public peace, knowingly possessing an unauthorized firearm and unsafe storage of a firearm and single counts of possession of a prohibited or restricted firearm with ammunition, tampering with a serial number and drug possession for the purpose of trafficking.

Gerald McNamara is also charged with two counts of possession of a firearm while prohibited and three counts of breaching a recognizance.