The dinar lost ground to 89.15 per euro after closing at 88.30 per euro on Friday, a local dealer told SeeNews around 1040 GMT.
There has been no central bank intervention so far in the day, he said, adding that the central bank is expected to step in.
“Just now, the market is a mess, the dinar went over 89.00 per euro,” another dealer told SeeNews at 1037 GMT.
Last week, the central bank, NBS, injected 120 million euro ($151 million) in the market to prop up the local currency, which touched a historic low of 89.00 dinars per euro.
($=0.7897 euro)