Police in Maynard are investigating a series of threatening graffiti spray painted across town overnight.

Sometime between 11 p.m. Thursday and 6 a.m. Friday, three anti-police messages were spray painted, police said in a statement.

One read "Kill cops now," and was left at the Mill and Main complex on Main Street.

Another message was "Kill Pigs," which was spray painted behind The Paper Store on Nason Street.

The third read "Down to Die" and was spray painted on the CVS on Main Street.

"These are extremely disturbing messages that we are taking very seriously," Police Chief Mark Dubois said. "This is no simple prank. It's a threat not only to this department, but to the community as a whole. We will investigate and hold the person or persons involved responsible to the fullest extent of the law."

Anyone with information on this is asked to contact Detective Daniel Bodwell at 978-897-1011 ext. 1029.