Gov. Martin O’Malley has ordered the Maryland flag to be flown at half staff in memory of the victims of “the senseless acts of violence” at the Boston Marathon on Monday.

The announcement follows a proclamation Tuesday from President Barack Obama, who ordered the U.S. flag flown at half-staff at federal buildings, military bases and embassies throughout the world “as a mark of respect” for the victims.

The flags are to remain at half staff each day until sunset on Saturday.