The King County Sheriff’s Department is reporting a straight-up diamond heist in Sea-Tac.

Like something out of a Guy Ritchie flick, the department says two masked men made away with $400,000 in diamonds after they assaulted two diamond couriers in a black Nissan. The suspects fled in a 4-door luxury car, “possibly a BMW or Mercedes.” The victims were in town from Hong Kong; the suspects are believed to be white men.

Here is the full release from the Sheriff’s Office:

***King County Sheriff’s detectives are trying to locate anyone who witnessed a robbery in SeaTac on Tuesday around noon. The victims are employed as diamond couriers and were in town from Hong Kong selling diamonds.

On Tuesday just before noon the victims were driving in a black Nissan 4dr in SeaTac. They drove onto the northbound on-ramp to I-5 from S188 St when a black 4-door passenger car cut them off and abruptly stopped in front of them. Another, as yet unidentified vehicle, struck the victim’s vehicle from behind.

Two men wearing masks and sunglasses approached the victim’s vehicle, assaulted the driver and broke out two windows of the car. One of the suspects reached into a broken window and grabbed a backpack containing the diamonds, value estimated at over $400,000. The suspects then fled in the black car.

One witness told police a third suspect stayed near the suspect vehicle and pointed a handgun at the victims while the other two suspects robbed them. Before fleeing one of the suspects punctured tires on the victim’s car.

The suspect vehicle is described as a black, newer model 4-door, possibly a BMW or Mercedes. The suspects were all described as wearing black clothing, including hooded jackets, masks and sunglasses. Both victims believe the suspects were white men since they could see their foreheads during the robbery..

If you witnessed this incident or have any information about this case please call the King County Sheriff’s Office at 206-296-3311. You can also call Crime Stopper and remain anonymous and be eligible for a reward of up to $1,000 by calling 1-800-222-TIPS.***