INDIANAPOLIS (AP) _ Police have arrested two students at an Indianapolis middle school, one accused of attacking staff members and another who allegedly brought a knife to school. Police in the Indianapolis enclave of Lawrence say one 13-year-old boy lunged at his teacher and head-butted him following an argument Friday at Fall Creek Valley Middle School. Another 13-year-old was arrested after he allegedly bragged about bringing a knife to school and threatened to cut other students. Both students have been placed in juvenile detention.