Thieves stole a diamond necklace and other jewels worth $2 million in two separate heists on the opening day of a jewelry fair in Hong Kong, The Associated Press reports.

Police spokeswoman Carrie So reportedly said the necklace, valued at $1 million, was reported stolen after two men had been in a display booth looking at it.

Elsewhere at the fair that opened on Tuesday, two boxes full of jewelry valued at a total of US$1 million were reported missing after four men and a woman visited the booth where they were on sale, So reportedly said.

Reports of missing jewelry at fairs in Hong Kong are common. Jewelry worth of $3 million was stolen in three separate cases during a fair in September held by a different organizer.

Police were looking for the seven people who had been in the booths before the thefts were reported, the AP reports.

JCK