Halifax police have arrested three men in connection with the death of 27-year-old Donald Chad Smith, who was shot and killed as he delivered pizza to a Dartmouth apartment almost three years ago.

Police responded to the shooting at an apartment building on Joseph Young Street on Oct. 23, 2010. They say Smith was pronounced dead at the scene.

Investigators arrested a Dartmouth man and a Cherry Brook man, both 21, in connection with the case Wednesday morning.

A third man was also arrested out-of-province before noon Wednesday, although police won’t say where the arrest was made. The 26-year-old man is originally from Dartmouth.

“They’re presently in custody. They’re being interviewed,” says Halifax Regional Police Const. Pierre Bourdages. “No charges have been laid at this time and the investigation is continuing.”

Police have 24 hours to either lay charges or release the individuals.

Bourdages says the Smith family has been notified about the arrests.

Last month, CTV News spoke with Smith’s mother, who said she had recently celebrated what would have been his 30th birthday.

“I’ll always celebrate his birthday and his heaven dates. I say heaven date because it’s a day Chad went to heaven,” said Louise Smith, who lives in Windsor Junction, N.S.

“He was a son, he was a brother, he was a dad. He had two young children.”

She also asked anyone with information about her son’s death to contact police.

“I’m just begging them as a mom who lost a child, please come forward. Do the right thing because you have information that could help bring justice.”

Smith’s case was added to the Nova Scotia Rewards for Major Unsolved Crimes program, which offers a cash reward of up to $150,000 for information that leads to an arrest and conviction in an unsolved case, in 2011.

However, Bourdages says the arrests were not made through the program.

Police believe there are more people in the community who have information about Smith’s death and are urging those people to contact them.

“We are encouraging people to come forward with the info that they have,” says Bourdages.