NBPD detectives are asking anyone who may know who the pictured man is to let them know.  He is wanted for two robberies over the holiday weekend.   One was at the Rite-Aid Pharmacy on Acushnet Ave Friday, and the other at the 7-Eleven on Acushnet Ave on Saturday.   Police say he was "very aggressive" and demanded that the clerks open the registers before running off with cash.   If you think you may know who he is, please call New Bedford police detective Michael carrier at (508) 991-6300, ext. 114.