Cash, post-dated checks and vouchers worth NIS 6 million were stolen on Saturday in a break-in at the offices of the Histadrut labor federation's pensioners group.
The group is mostly involved in organizing seminars and vacations, as well as providing gifts for its 4,000 members.
The theft came at a particularly sensitive time: There was an exceptionally large amount of money in the three safes as the group was preparing its members' gifts for the Rosh Hashanah New Year holiday.
The thieves torched open the safes in the pensioner offices at the Histadrut complex in Tel Aviv; the organization's employees are currently on summer vacation.
Police are investigating what they call an "extremely serious crime" and sources say it is still not clear whether the thieves had inside help.
The Histadrut does not know whether the vouchers were numbered sequentially and whether it's possible to prevent their use.
There are also fears that all the stolen money, checks and vouchers were not properly recorded due to mismanagement.
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