Published Tuesday, 20 August 2013
It is believed the man, who is from the town, was known to all three women.
The suspect was arrested on Tuesday morning and taken to the Serious Crime Suite at Antrim police station for questioning.
The three women all died in suspicious circumstances, police confirmed.
Michelle Bickerstaff, 47, died in April last year; Margaret Weise, 50, died in August 2007 and 52-year-old Elizabeth McKee died in December 2002.
The families of the deceased women have been informed by police.
The suspect has also been arrested for a number of other offences in relation to other women.
Meanwhile, police have said that a man in his 60s was arrested at the time of Ms Bickerstaff's death. He was released unconditionally.
Jenny Dickinson, only daughter of Ms McKee, described her mother as fun, kind and with a good sense of humour. She had volunteered with the Ulster Society for the Prevention of Cruelty to Animals.
"I know that the police have been working hard with these cases... We want to see justice," Ms Dickinson said.
Your information could provide us with the vital link to enable us to bring this investigation to a successful conclusion.
DCI Richard Harkness
Detectives from Serious Crime Branch, who are investigating the deaths of the women, have appealed for information in Dromore.
Detective Chief Inspector Richard Harkness said: "We are keen to speak with anyone who may have any information which could assist us and I would urge members of the community in Dromore to contact us.
"People may have been reluctant to come forward in the past but I can assure you that any information given to the Police will be treated in the utmost confidence."
Jeffrey Donaldson, DUP MP for Lagan Valley, told UTV that local people were in shock.
"Our first thoughts are with the families of these women today," he said.
"This must be terrible, indeed, devastating news for these families and we can only hold them up in prayer."
Mr Donaldson appealed for anyone with any information in relation to the women's deaths to contact the police.
UUP Councillor Carol Black added: "This community is devastated.
"My thoughts go out to the families today. It's very raw. They are in a grieving process.
"We know this particular gentleman. He comes from this community," she added.
© UTV News