Webmerrimack police said they were called at about 7:45 a. m. After a group of protesters blocked the entrance to elbit systems. subscribe to wmur on youtube. Webmerrimack police said they were called at about 7:45 a. m. After a group of protesters blocked the entrance to elbit systems. Webthree people were arrested monday after protesters targeted the merrimack facility of an international defense electronics company based in israel.