Belgium holds more suspects in 2-year-old diamond heist case, hopes for breakthrough

WITH STORY BELGIUM DIAMOND HEIST - In this Tuesday, Feb. 19, 2013 file photo, baggage carts make their way past a Helvetic Airways aircraft from which about $50 million worth of diamonds were stolen on the tarmac of Brussels international airport. Belgian authorities are hoping they have made a major breakthrough in solving a two-year-old heist of some 40 million euros in diamonds and gems that were stolen in a brazen attack at Brussels international airport. During a series of raids early Monday, March 16, 2015, authorities made several arrests and were analyzing goods that could be linked to the Feb. 18, 2013 theft, which still ranks as one of the biggest diamond heists in recent memory. (AP Photo/Yves Logghe, File) (The Associated Press)

WITH STORY BELGIUM DIAMOND HEIST - In this Tuesday, Feb. 19, 2013 file photo, an armored truck of Brinks Diamond an Jewelry Services arrives at the cargo section of Brussels international airport. Belgian authorities are hoping they have made a major breakthrough in solving a two-year-old heist of some 40 million euros in diamonds and gems that were stolen in a brazen attack at Brussels international airport. During a series of raids early Monday, March 16, 2015, authorities made several arrests and were analyzing goods that could be linked to the Feb. 18, 2013 theft, which still ranks as one of the biggest diamond heists in recent memory. (AP Photo/Yves Logghe, File) (The Associated Press)

WITH STORY BELGIUM DIAMOND HEIST - In this Tuesday, Feb. 19, 2013 file photo, airport security officers stand near a fence that was cut next to the tarmac, at Brussels international airport. Belgian authorities are hoping they have made a major breakthrough in solving a two-year-old heist of some 40 million euros in diamonds and gems that were stolen in a brazen attack at Brussels international airport. During a series of raids early Monday, March 16, 2015, authorities made several arrests and were analyzing goods that could be linked to the Feb. 18, 2013 theft, which still ranks as one of the biggest diamond heists in recent memory. (AP Photo/Yves Logghe, File) (The Associated Press)

Belgian authorities are hoping they have made a major breakthrough in solving a heist of diamonds and gems worth some 40 million euros ($42 million) at Brussels' international airport two years ago.

During a series of raids early Monday, authorities made several arrests and were analyzing goods that could be linked to the theft, which ranks as one of the biggest diamond heists in memory. Authorities refused to say how many were arrested.

On Feb. 18, 2013, eight gunmen cut a fence around Brussels airport, drove onto the tarmac where an armored car was transferring the gems onto a Zurich-bound airplane and drove off again with the loot.

So far, 14 have been charged in the case but most of the diamonds are still missing.