Officials in the Massachusetts community of Methuen told residents tonight to be on the lookout for people on foot “who appear out of place, unfamiliar to the area or behaving in a manner that seems unusual or suspicious.”

The statement, which the Methuen Police Department posted after law enforcement investigators were seen outside a storage unit in the nearby New Hampshire community of Salem, said federal, state and local authorities are mobilizing resources near the New Hampshire-Massachusetts border.

“This activity is connected to an ongoing effort to locate a suspect in an active investigation into a recent death,” the statement says, adding that there is no imminent risk to the public but that residents should remain vigilant.

Methuen and Salem are miles apart on either side of the state line. 

The law enforcement presence in Salem is believed to be connected to the Brown University shooting.