New Delhi, June 30 -- In a shocking case that has sparked serious concerns over school safety in the United States, four fifth-grade students at a school in Arizona were arrested for allegedly plotting to murder a classmate and disguise it as a suicide, NBC News reported.

The disturbing plan came to light after one student overheard the conversation and alerted a parent.

The incident occurred at Legacy Traditional School in Surprise, Arizona, in October last year, but details have emerged now through a newly released police report. According to the report, the group of 10 and 11-year-olds allegedly planned to lure a fellow student to a bathroom, fatally stab him, and leave a forged suicide note to make the act appear self-inflicted.

Th...