Swastika found on playground; a symbol of hate or part of Diwali holiday

Students at Bentley Elementary School in Canton found a swastika symbol made of wood chips on the playground. When school workers saw it, they were concerned.  The school sent out a robocall notifying parents, letting them know police were investigating, and asking them to share any information they had.  But now parents are wondering, was it an act of hate or has there been a misunderstanding?