Someone spray-painted gang signs and anti-religious markings on doors, windows and even a van in the parking lot.
Dallas police say sometime after midnight on Monday, the North Texas Hindu Mandir Temple was tagged. Among the taggings were the mark of the gang MS-13, along with a "666" and an upside down cross.
Three days before that, vandals broke into a storage shed.
With no suspects so far, temple members plan to install security cameras and a fence around the perimeter to prevent future problems.
Police haven't determined if it's a hate crime.
In response to the taggings, neighbors are organizing a community cleanup scheduled for Sunday at 12:15 p.m.