In the wake of a shooting at Martinsville West Middle School last month, threats have been on the increase in recent weeks, mostly at schools south of Indianapolis.The latest examples are from Perry Township, in southern Marion County, and Brown County.The Metropolitan School District of Perry Township said there was a threat scrawled in a boy's restroom at Southport 6th Grade Academy this week."School administrators have been in contact with officials at the Indianapolis Metropolitan Police Department," read part of a release from the school district. "We are vigorously investigating to determine the identity of the person responsible for the threats. When this individual is identified, it is our intent to prosecute to the fullest extent of the law."The school said it will have additional security measures in place on Friday, and several officers were looking through the bushes outside the school."We take all threats of violence seriously," part of the statement read. "The safety and security of our students is our No. 1 priority."Student William Lawson said he saw writing in a hall concerning the threat."I saw where it said, 'It's going to be big. Are you ready?'" Lawson said. "That was scratched in. They cleaned the rest off.""I just think someone is trying to pull a prank or something," said Travis Shaw, a 7th-grade student. "They're just trying to scare people off.""I'm surprised there's not police everywhere, and I'm surprised there's not a metal detector at the front door, to be honest," said parent Shelia Lauster.Threatening graffiti was also found Thursday at Brown County High School. The nature of the threat wasn't released.There were also some recent threats at schools in the Bloomington area.