Three houses were searched in Lisburn, Belfast and Antrim in connection with the seizure.
A man interviewed by police was later released, pending further enquiries.
Detectives worked alongside officers from the National Crime Agency in the operation.

"After eight wonderful years on The X Factor it's time for me to move on," he said in a statement.
"I'd like to thank ITV, Simon [Cowell], The X Factor family and particularly the viewers, all of whom have been a big part of my life for so long."
The 41-year-old took over from Kate Thornton in 2007 as host of the popular talent show.
The presenter and broadcaster currently presents a show on Radio 2 and recently completed a 24-hour dance challenge for Comic Relief.
"I'd like to wish the team all the best for the future, especially whoever takes over from me," O'Leary continued.
"You're about to be the conductor on the most brilliant, runaway train in showbiz. Good luck you'll love it!"
The news of his departure may fuel speculation that O'Leary is a contender to replace Jeremy Clarkson on the BBC's Top Gear.
Before Friday's announcement, William Hill had O'Leary as 6-1 to take over following the BBC's decision not to renew Clarkson's contract earlier this week.
Before The X Factor, O'Leary hosted Big Brother's Little Brother, Channel 4's companion show to its long-running reality show.
He has presented on BBC Radio 2 since 2004 and has hosted the National Television Awards since 2010.
Bookmakers Ladbrokes have made singer Olly Murs, a former X Factor runner-up, favourite to take over the vacant presenting role.
A spokesman for ITV said O'Leary had been "a fantastic host of The X Factor" and that the channel was "sorry to see him go".
"We wish him all the very best for the future and hope that he'll be back on ITV screens soon."

The posters were uncovered in Clacton, Essex, earlier this week.
Danny Sloggett, 40, spotted the retro signs in Meredith Road and now wants to ensure they do not end up hidden away again.
"They're relics, they're our history and they show off Clacton's power," Mr Sloggett said.
"The royal family used to come here in the 1920s and 30s. Lots of people used to come from London, and things like this are an important part of our history which has been hidden away."
The posters, which advertised Ambrosia, Black Cat cigarettes and a local cafe, are on the side of a building currently occupied by Sheen's Estate Agents.
An employee there said "loads of people" had come to take pictures over the last few days once the signs had been exposed.
On Facebook, one user said the billboards "should be covered with perspex like the Banksy stuff".
"Should definitely restore it and photograph for a museum," wrote another.
Mr Sloggett said he had not yet contacted Tendring District Council about the possibility of preserving the signs as he wanted to build support for his cause before doing so.
"They're amazing things. I know the history of Clacton but it's nice to see it on display," he said.
The BBC was unable to contact the company that owns the modern billboard.

23 May 2016 Last updated at 17:21 BST
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Dermot O'Leary will no longer host ITV's The X Factor after eight years on the programme.
[NEXT_CONCEPT]
Advertising billboards thought to be from the 1920s discovered behind a modern hoarding should be preserved "for all to see", a blogger has said.
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